Racing driver David Coulthard makes a speedy exit as he leaves The Box nightclub with a mystery woman

He was in such a rush to leave The Box nightclub last night that he ended up falling over and having to be helped up by a passer-by.

But perhaps the reason David Coulthard didn't want to be photographed leaving the nightspot was because he was with a mystery blonde woman.

The 40-year-old sportsman did his utmost not to be photographed with the unidentified lady, who left little to the imagination in her outfit for the evening - a tight black strapless dress.

What's going on here? David Coulthard left the Box nightclub in London last night with a mystery blonde woman

Making a run for it: Coulthard did his utmost not to be photographed in the same shot as his blonde friend (seen behind)

After being helped up after his fall, Coulthard sped off into the night while his blonde friend got into a waiting taxi and headed home.

It remains to be seen what Coulthard's fiancée Karen Minier, with whom he has a young son, makes of the situation.

Minier, who also has a daughter from a previous relationship, is believed to have now moved to Monaco to be with Coulthard, after raising son Dayton in Brussels for the first year of his life.

Whoops! In his haste to get away, Coulthard fell over and had to be helped up by a passer-by

Upsy daisy: Coulthard is pulled to his feet by the helpful man outside the club

And while the couple have yet to set a date for their nuptials, Coulthard has already chosen the venue after visiting the revamped Silverstone racing course yesterday.

After falling in love with the new £27million complex, Coulthard asked bosses if he would be able to hold his wedding in the Silverstone Wing, to which they agreed.

The Box is one of London's hottest nightclubs, and celebrities including Kate Moss, Emma Watson, Stephen Fry, Leona Lewis and Keira Knightley are all regular visitors.

Loved-up: Coulthard with fiancée Karen Minier, with whom he has a young son

The man behind The Box is 31-year-old Simon Hammerstein, a public-school educated grandson of celebrated lyricist Oscar Hammerstein, who described his venue as a place of ‘mystique, mystery and sexual openness’.

The London venue opened seven weeks ago following the success of its sister club in New York’s Lower East Side.

In Manhattan, The Box’s explicit stage shows quickly sealed its reputation as the place to be seen after it opened in 2007.