Ross Brawn should be firing on all cylinders as he returns to the pitwall in Monaco this weekend.

Mercedes’ team principal sat out the recent Spanish grand prix due to illness, but a scarcity of extra information triggered speculation.

One rumour was that he is seriously ill, whilst another was that his absence may in fact be due to his German employer’s high-stakes spat with Bernie Ecclestone.

The latter theory gained traction since Barcelona, with acting team boss Nick Fry taking a much higher than usual profile, including naming Paul di Resta as a possible 2013 successor for Michael Schumacher.

Explaining his absence, Brawn told Bild newspaper: “On the Tuesday before Barcelona I felt unwell so I went to the doctor and then stayed a night in hospital for some tests.

“When I got home, I decided on the advice of doctors to give myself a weekend off, to be sure that I am fit for Monaco,” the Briton said.

Partly because of Brawn’s deputy Fry’s recent comments, and also due to his paltry points tally and his crash with Bruno Senna, rumours about Schumacher’s future have intensified since Spain.

“A lot has been said and written,” acknowledged Brawn, “but we should not forget that we – the team – have let him down in three of the fives races, not delivering the job we should have.

“We must do better,” Brawn, who worked closely with Schumacher during the seven time world champion’s ultra successful Ferrari era, added.

“We saw Michael’s real quality again in the first race, so it’s for that reason that I believe we will see him on the podium this year.”

As for a possible contract extension for the 43-year-old, Brawn insisted: “When the time comes, we will sit down together and talk about the future.

“I’m sure it will become clear very quickly in what direction we will go.”

More than half of Michael Schumacher’s German compatriots think the seven time world champion will return to retirement at the end of this year.

After three years of retirement, the 43-year-old returned to F1 in 2010 on a three-year Mercedes contract, which runs out in 2012.

SID news agency commissioned the German market research company Promit to carry out a survey as to whether respondents think Schumacher will quit at the end of this year.

55.4 per cent answered yes, while only 26.2 per cent said they think Schumacher should sign on for at least another season.

The winner of a record 91 grands prix has failed to see the chequered flag in three of the five races so far this year, finishing just tenth in both Malaysia and Bahrain.

In contrast, teammate Nico Rosberg’s three top-seven finishes in 2012 included pole and victory in China, netting him 41 points compared with Schumacher’s 2 overall.

“I don’t think we can write him (Schumacher) off yet,” insisted Telegraph correspondent Tom Cary this week.

“His pace hasn’t been bad and he started the season very well. (He) was unlucky in quite a few races, his wheel fell off when he was running second in China and could have had a big haul of points.

“He is making mistakes in wheel-to-wheel racing though. But if he gets a few decent finishes or even wins a race then we could see him continue (in 2013),” added Cary.

Preparations for the inaugural Russian grand prix in 2014 appear to have hit a roadblock.

We reported last weekend that rumours were circulating in the Barcelona paddock that the Sochi race now appears “doomed”.

The state owned Moscow news agency Ria Novosti now reports that political issues have created “serious delays” in the race’s preparations, according to an adviser with the Russian Automobile Federation.

The official, Igor Yermilin, insisted that the project is not doomed, but he said very few efforts have taken place following the bureaucratic reshuffling of the local Krasnodar region.

He said some officials of the Omega company, responsible for the F1 circuit project, have lost their jobs.

“In the Krasnodar region there has been have been quite serious changes in the leadership,” Yermilin said, “including people from Omega who signed the contract on holding the Russian grand prix”.

The coastal city Sochi is also scheduled to host the 2014 Winter Olympics.

“The main thing at the moment is the Olympics — the grand prix is on the back burner,” said Yermilin.

Martin Whitmarsh is sure McLaren’s recent errors will not affect contract negotiations with Lewis Hamilton.

The British team’s latest mistake not only cost Lewis Hamilton pole in Spain, it put the 2008 world champion to the very back of the grid.

Asked if he worries that the now seemingly constant flow of team gaffes will damage McLaren’s efforts to re-sign Hamilton, Whitmarsh insisted: “No, I don’t.

“He has got to build the support of the team, he has got to feel comfortable doing it, he has got to want to drive and he is in good shape,” British newspapers quote the McLaren team principal as saying.

“I look forward to working with him for a long time to come.”

But Whitmarsh admitted that, given Hamilton’s tumultuous 2011 season, he was worried the British driver might have despaired last Saturday when the team’s refuelling mistake cost the 27-year-old pole.

“I was concerned,” he said, “because it is a pretty tough thing to happen to a driver.

“But I have to say he showed some greatness I had not seen before. By the end of our chat he was consoling me.

“The relationship between Lewis and the team is stronger and better and hopefully we will work together for a long time,” added Whitmarsh.

The penalty might be harsh, but the loss of Lewis Hamilton’s pole in Spain is just the latest calamitous mistake by McLaren.

That was the tone of the paddock’s reaction to the news late on Saturday that a McLaren gaffe saw the FIA send Hamilton from first to last on the Spanish grand prix grid.

The Sun newspaper called it a draconian “24-place grid penalty” imposed by the FIA after an “astonishing cock-up” by McLaren.

Hamilton was told on the radio to pull over after his pole lap due to a “technical problem”.

Sporting director Sam Michael argued ‘force majeure’, but the stewards ruled that it had been entirely McLaren’s fault that not enough fuel was put into Hamilton’s car to ensure a scrutineering fuel sample.

Writing in the Telegraph, Tom Cary said the severity of the disqualification “raised eyebrows”, but agreed that “McLaren’s mistake was horrendous”.

He said it has been “a season of errors” by the famous British team, who are yet to get Hamilton’s signature on a new contract beyond 2012.

“Hamilton must be seething,” read an article in the Daily Mail newspaper, while The Times laid out McLaren’s “catalogue of errors”.

27-year-old Hamilton’s “raw talent is being thwarted by mishap and cock-up,” said journalist Kevin Eason.

“McLaren are lovely people but how the hell do they get themselves in this position?” wrote the Mirror’s Byron Young on Twitter.

Even the non-English language media agreed.

“It was another great mistake by McLaren that could eventually cost Hamilton the championship,” wrote Livio Oricchio in O Estado de S.Paulo.

Italy’s La Stampa called McLaren’s fuel gaffe a case of “harakiri”.

Germany’s Auto Motor und Sport added: “It was error number 13 for McLaren since last year”.

While highly critical of McLaren’s own-goal, however, the feeling in the paddock is that the stewards’ penalty – although accepted by McLaren – was overly harsh.

“Back of the grid? Way, way too harsh”, said the Mirror’s Young on Twitter.

“Draconian penalty in my view,” agreed PA Sport’s Ian Parkes. “Dropping Q3 time would have sufficed.”

Sky commentator Martin Brundle added: “(I) feel they should have deleted that (Q3) laptime only which would have put him sixth”.

And excluding Hamilton from Q3 altogether would have put him 11th. Now, he will be “lucky to score a point”, Auto Motor und Sport predicted.

In the Independent, however, David Tremayne noted: “Welcome to the draconian world of F1.”

David Croft, the lead Sky commentator, said the FIA stewards had acted correctly.

“A good rule should be one that covers all eventualities with a penalty that acts as a deterrent which in this case is what happened.

“Too little fuel can’t be tolerated,” he added. “It seems harsh but had Lewis taken pole by one thousandth of a second, would it be harsh then?”

The Spanish fans – not Hamilton’s biggest supporters dating back to his spats with Fernando Alonso in 2007 – were happy.

Asked on the El Mundo website whether the penalty was fair, 76 per cent answered yes.

Valencia will not be on next year’s F1 calendar, Bernie Ecclestone said on Saturday.

He confirmed that, starting in 2013, an annually alternating deal between the Spanish port city and Barcelona will begin.

Barcelona, the scene of this weekend’s Spanish grand prix, will host the race in 2013, before Valencia returns to the schedule in 2014, the F1 chief executive told Reuters.

Less secure, meanwhile, is France’s touted spot on the 2013 calendar, particularly with the country’s new anti-F1 president Francois Hollande now taking power.

Until recently, the F1 chief executive was saying Paul Ricard was set to join the 2013 calendar, annually alternating a race date with Belgium’s Spa Francorchamps.

As for the state of the deal now, the 81-year-old admitted: “I have no idea. No idea what they (France) are doing.

“It’s a funny arrangement they were making anyway. So I just don’t know.”

Ecclestone is also working on a new deal for the popular Canadian grand prix, having told promoter Francois Dumontier that the Circuit Gilles Villeneuve needs to be upgraded.

“There are two ways of looking at it,” Dumontier, in the paddock of the Circuit de Catalunya, is quoted by La Presse newspaper.

“Either Bernie requires an annual fee windfall, or he will charge a reasonable fee and ask in return for investment in the infrastructure.”

He said the contract on the table is for 10 more years, taking Montreal’s existing deal through 2024.

Ecclestone said on Saturday that he is sure an agreement will be reached, because Canada is one of F1′s most loved destinations.

“I remember saying to Bernie, ‘New York, Austin, I don’t know why you want to go there. Your sure bet is Montreal’. He knows that.

“He’s been in Montreal for 34 years. And in the 22 years of the grands prix in the United States, they’ve had eight different cities.

“He said ‘You’re right’,” added Dumontier.

Another rumour, repeated by The Times’ Kevin Eason on Saturday, is that the planned 2014 Russian grand prix in Sochi “is doomed”.

Narain Karthikeyan has played down reports he could lose his seat at HRT because of a lack of sponsorship.

An Indian newspaper this week said the 35-year-old is a million euros short of guaranteeing his place at the struggling Spanish team through November’s Brazil finale.

“Right now, everything is as it should be,” he is quoted by France’s autohebdo.fr.

“Early in the season, (team boss) Luis (Perez Sala) said that if I was not close enough to my teammate, there is a chance I will not finish the season.

“That was put into my contract, but for now I respect all the conditions. There is no reason that I will not be driving (the rest of) this season,” added Karthikeyan.

He admits, however, to some frustration about HRT’s continuing rear-of-the-field position.

“To be honest I wasn’t expecting the start of 2012 to be on the same lines as last year,” the Indian driver told the Hindustan Times newspaper.

“Yes I expected teething problems but not to this extent.”

He also admits he expected the team to test at Mugello last week.

“Personally speaking, I would’ve preferred some seat time at Mugello since I didn’t get any pre-season testing compared to my teammate who did the Jerez test with the old car,” said Karthikeyan.

“I was originally told that we would do the Mugello test but we decided to focus on putting the car together instead.”

It was a breakthrough for Mercedes and Nico Rosberg, but the Chinese grand prix was a “difficult day” for Michael Schumacher.

That is the admission of Shanghai winner Rosberg, whose first race win after more than 100 attempts also delivered German marque Mercedes’ first works victory for more than half a century.

“I felt he was very happy for me,” Rosberg told Auto Bild Motorsport, when asked what seven time world champion Schumacher’s reaction was.

Since returning to F1 more than two years ago, 43-year-old Schumacher – although stepping up his pace in 2012 – is yet to finish a single grand prix on the podium.

Nonetheless, he offered his congratulations “very, very warmly” after China, Rosberg revealed.

“At the same time I know that it was, of course, a difficult day (for him),” he admitted.

Norbert Haug, the team’s motor sport director, recently sounded inclined to keep Rosberg and Schumacher together beyond 2012, despite the fact the older and more famous German’s contract is ending.

He insisted there is “nothing negative” about their relationship.

As for ongoing rumours that Schumacher still enjoys number one status, Haug called that idea “absolute nonsense”.

“Do you know what Nico said to me, before Michael came? He said ‘If you can get Michael (on the team), then try everything for it’.”

Rosberg has not changed his tune.

“There was never a situation in which Michael got anything before I did,” he confirmed.

Narain Karthikeyan is not guaranteed his HRT seat for the whole of the 2012 season.

Following what the reporter referred to as a ‘chat’ with the Indian driver, the Times of India claimed Karthikeyan is “a million euros” short of a contract that will see him definitely race through November’s Brazil finale.

The 35-year-old also began the 2011 season for the struggling Spanish team, but was replaced by the Red Bull-funded Daniel Ricciardo mid-season.

The Times of India said securing the extra million in sponsorship is proving “difficult” for Karthikeyan.

“Sponsors are happy to give him money but not to the team, as obviously they do not want to be associated with a struggling outfit,” the report said.

The good news for Karthikeyan, according to the journalist Harish Samtani, is that his sponsorship deal with Tata brings to HRT the Williams gearbox, valued at about EUR 5 million.

The report said the link between Karthikeyan and Williams is the British team’s joint venture with Jaguar, which is owned by the driver’s sponsor Tata.

Montreal has been warned to spend around $15 million on the Circuit Gilles Villeneuve or risk losing the Canadian grand prix.

La Presse reports that Bernie Ecclestone has said only a major redevelopment of the circuit will lead to talks about a new contract beyond 2014.

The report said that, in light of the F1 chief executive’s warning, Montreal mayor Gerald Tremblay has appealed to higher levels of government for the necessary money.

“Negotiations are underway between the three levels of government and the bodies of formula one”, the report said.

Race promoter Francois Dumontier told RDS: “It’s premature to talk about this.

“There are still two years to go on the current contract. We have started talking, but that it’s out now I find excessive. Honestly, I don’t know where it’s come from.”

He added: “Given that the permanent installations of the circuit, including the control tower and the garages, are nearly 25 years old, it is likely that their repair is an important element in the negotiations for an extension to the current agreement.

“But it seems to me to be premature to talk specific sums.”

Rubens Barrichello has alleged that Ferrari made a threat that might have ended his motor racing career during the infamous 2002 Austrian grand prix.

Ten years ago, the Brazilian led the race at the A1-Ring but eventually, at the very last corner, succumbed to team orders that allowed number one teammate Michael Schumacher to pass him.

Subsequent video footage has depicted then Ferrari team boss Jean Todt asking Barrichello on the radio to simply “let Michael pass for the championship, please”.

But Barrichello, having left F1 at the end of 2011 for a seat in Indycar, says it was not quite as simple as that.

“It was eight laps of war,” he is quoted by Brazil’s Globo.

“It’s very rare that I lose my temper, but I was screaming on the radio. I kept going right to the end, saying I would not let him pass.

“That’s when they said something about something much broader. It was not about the contract.

“I cannot tell you what they said, but it was a form of threat that made me think about re-thinking my life, because the great joy for me was driving,” said the 39-year-old.

Paul di Resta has emerged as the latest candidate to possibly succeed struggling Felipe Massa at Ferrari.

Britain’s Mirror newspaper said the famous Maranello based team has “made enquiries” about the 26-year-old Scot’s current contract with Force India.

The speculation follows Red Bull’s closing down of rumours linking Mark Webber with the switch, as Christian Horner and Dietrich Mateschitz suggested the Australian is set to continue beyond his 2012 contract.

Ferrari chiefs “are known to be impressed” with di Resta since he moved as the reigning DTM champion to formula one at the end of 2010, the Mirror’s F1 correspondent Byrton Young wrote.

“Paul di Resta would be a very good target for Ferrari because (Fernando) Alonso probably has the best toolkit of knowledge and physically is one the best drivers in the world,” triple world champion Sir Jackie Stewart is quoted by the Daily Mail.

“Alonso is almost at his peak and to have a young driver such as di Resta be an understudy to Alonso is something I’d consider if I was at Ferrari,” he added.

Mark Webber appears headed for a new contract with Red Bull, after receiving a clear vote of confidence from the energy drink company’s chief.

Following speculation the 35-year-old Australian could be headed to Ferrari in 2013, Red Bull team boss Christian Horner insisted Webber “is happy to be here, and we are happy to have him with us”.

And the Swiss newspaper Blick has revealed that team owner Dietrich Mateschitz, the billionaire mogul, is also happy with Webber.

“I hope that he keeps driving with us for a long time,” the 68-year-old is quoted as saying.

Maria de Villota is not ruling out appearing during a Friday morning practice session some time in 2012.

The 32-year-old Spaniard made international headlines in March when she signed with Marussia as a test driver.

She subsequently admitted, however, that – despite travelling to all the grands prix with the former Virgin team this year – she is “not the reserve driver”.

De Villota, whose father Emilio is a former F1 driver, also clarified in March that she is not contracted to practice on Friday mornings.

But she is not ruling it out now.

“It depends on the team,” she told the Spanish news agency EFE.

“I am trying to do all my duties well so that they are happy with me. And I think they are,” said de Villota.

“But the car is new and the drivers need the miles to develop it. So it’s up to the team (to decide).

“Hopefully it will happen soon, but what happens this year will happen. There may be surprises, but for now I am getting to do a lot of work in the simulator.”

Meanwhile, she made a bold prediction when asked which team she tips to win the so-far unpredictable 2012 championship.

“I think that McLaren is very strong,” said de Villota.

The last female driver to take part in official grand prix sessions was the Italian Giovanna Amati, who failed to qualify for three races in 1992.

Red Bull’s team boss has moved to ease speculation Mark Webber could be set to change teams at the end of 2012.

The 35-year-old Australian is now on only a one-year contract, triggering reports he has been lined up by Ferrari as a potential successor to the struggling Felipe Massa.

But subsequent speculation said Red Bull is in fact close to offering to extend Webber’s deal.

Team boss Christian Horner ridiculed the Ferrari rumours.

“I think it’s inevitable,” he is quoted by France’s L’Equipe. “Almost every driver in the paddock is supposed to be joining Fernando Alonso next season.

“We’re staying focused on ourselves. Mark is happy to be here, and we are happy to have him with us,” said Horner.

“When the time comes later this year, we will sit down and discuss the future with him, as we have done in previous seasons.

“Speculation like this is part of the business,” he insisted.

“Mark has driven very well in these first few races, finishing fourth four times. Of course we would like to see him on the podium but he has scored some very important points.

“He can do great things this year. I think with Sebastian (Vettel), they push each other — it’s also thanks to him (Webber) that Sebastian gives the very best of himself.

“There is a good dynamic between them and that’s exactly what we want,” Horner said.