Olympic officials have secretly asked if London would be in a position to take over hosting the 2016 games from Rio de Janeiro amid major concerns with the city’s preparations.

The informal enquiry looked to determine if enough of the venues used in the 2012 games could be brought back into use for the next Olympics in two years time, the Evening Standard reports.

The revelation comes as an International Olympic Committee vice president last month branded Brazil’s planning “the worst I have experienced”.

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John Coates, who has closely monitored progress from Rio, told a press conference in Sydney that the city is “in many, many ways” further behind Athens was two years before the 2004 games - the current benchmark for last minute completions.

Calling the situation on the ground “critical”, Mr Coates said the IOC has been forced to make an “unprecedented” intervention by forming a special task force to try to speed up preparations.

He added however that “there is no plan B” as the games could not be moved to a different city at such a late stage.

Since then, it seems that the IOC may well have changed its mind and started searching for a backup plan which could involve London.

A source told the Standard: “At a comparable planning stage in 2004 Athens had done 40 per cent of preparations on infrastructure, stadiums and so on. London had done 60 per cent. Brazil has done 10 per cent - and they have just two years left. So the IOC is thinking, ‘What’s our plan B?’

“Obviously, the answer would be to come back to London. It’s very unlikely but it would be the logical thing to do.”

Shape Created with Sketch. Taking the plunge at the London Aquatics Centre Show all 6 left Created with Sketch. right Created with Sketch. Shape Created with Sketch. Taking the plunge at the London Aquatics Centre 1/6 The wave The exterior of the Zaha Hadid-designed centre Jason Alden 2/6 Olympic proportions Inside the centre where Ellie Simmonds won four medals for Team GB Jason Alden 3/6 Taking a dip The Independent's Jamie Merrill follows in the footsteps (or breaststrokes) of Olympians Jason Alden 4/6 Worn out? Jamie Merrill finishes his swim at the Aquatic Centre Jason Alden 5/6 Swimming mad sisters Hayley and Ashley Newman got up at 6am to make the journey up from Hythe in Kent to travel to Stratford Jason Alden 6/6 Team GB One member of the public was proud to celebrate the Olympic legacy at the Aquatic Centre Jason Alden 1/6 The wave The exterior of the Zaha Hadid-designed centre Jason Alden 2/6 Olympic proportions Inside the centre where Ellie Simmonds won four medals for Team GB Jason Alden 3/6 Taking a dip The Independent's Jamie Merrill follows in the footsteps (or breaststrokes) of Olympians Jason Alden 4/6 Worn out? Jamie Merrill finishes his swim at the Aquatic Centre Jason Alden 5/6 Swimming mad sisters Hayley and Ashley Newman got up at 6am to make the journey up from Hythe in Kent to travel to Stratford Jason Alden 6/6 Team GB One member of the public was proud to celebrate the Olympic legacy at the Aquatic Centre Jason Alden

Director of event consultants Allium, Will Glendinning, who worked on the London Organising Committee for the 2012 games said that there was “more than enough time” for London to prepare.

“Yes of course it can be done,” he said. “One of the UK’s greatest exports is our major events capability. The expertise exists and regarding facilities we are a couple of years away.”

But a spokeswoman for the IOC said the possibility of Rio 2016 being moved to London was a “non-starter and unfeasible”.