Formula One boss Bernie Ecclestone has refused to rule out the possibility of a London Grand Prix.
Regent Street will host an F1 demonstration in July
Ecclestone has been heavily critical of facilities at Silverstone, the venue for the current British Grand Prix.
And when asked by BBC Five Live if the race could move to London, he replied: "Everything is possible."
F1 drivers, reportedly including Jenson Button and Michael Schumacher, will race down London's Regent Street on 6 July as part of an F1 display.
The display will take place in the week leading up to this year's British Grand Prix, which could be the last staging of the race at Silverstone.
Ecclestone is pushing for more money to be spent on the track if it is to keep its place on the F1 calendar in 2005.
Improvements to Silverstone have been held up by a row between Ecclestone and the British Racing Drivers' Club, which owns the track.
However, international motorsport boss Max Mosley said: "I believe a deal has actually been done or is very close to being done that will assure the Grand Prix for the next 2005 and 2006."
"It is not something we (the FIA) have got any say, but the best evidence is that it is going to get sorted out."
If London were to win the right to stage the race, it would join Monaco as the only Grands Prix to be raced through city streets.
BAR boss David Richards believes it is not beyond the realms of possibility that London could host the British Grand Prix in the future.
"Let's take it one step at a time," he told BBC Five Live.
"The demonstration on Regent Street is going to be absolutely awesome - it's a new approach to bringing F1 to the people.
"We have an excellent race circuit at Silverstone and I believe that is the right venue for the British Grand Prix.
"But anything can happen in this business and Monaco has benefitted enormously from having the race on its streets, so who knows?"