Overview: Jeremy, Richard and James are challenged to drive from the heart of Switzerland to the north-western coast of England on just one tank of fuel, with the winner switching on the Blackpool illuminations. James also power tests the Pagani Zonda F Roadster, and the Stig sets a lap time in the Bugatti Veyron. Grand Designs presenter Harry Enfield is the Star in a Reasonably Priced Car.