Those in attendance included racing superstars such as Lewis Hamilton and Jenson Button, as well as famous faces such as Phillip Schofield and Rio Ferdinand.
Mr Ecclestone has offered to put up ?35?million to stage the race on a 3.2-mile circuit around landmarks including Buckingham Palace and Trafalgar Square.
A spokesman for the Mayor said: ?London hosts a vast array of world events and the Mayor is always keen to explore new opportunities to do so, especially if they will create jobs, bring investment and further London?s lead as a world city but we have as yet not received proposals.?
Experts believe the race, watched by 120,000 fans in grandstands, could generate ?100?million for the London economy. Mr Ecclestone said: ?It would be? fantastic ? good for London, good for England ? a lot better than the Olympics.?