Hamilton drives a cab in support of the drink-drive campaign

Formula One World Champion Lewis Hamilton took to the wheel in a London black cab to back an anti-drink-drive campaign.

More used to high-powered top performance racing cars, Hamilton teamed up with double world champion Mika Hakkinen for the trip as part of the Johnnie Walker responsible drinking programme.

The pair hailed the public transport drivers who get people home safely as "the real champions" behind the wheel.