William sponsored AlisterScott for 140 mile Coast-to-Coast run-bike-canoe by doing Smart drive over two months.
Here are the details of their pledge:
How many of these changes are you going to make? (click 'read more' to see the list)
All five – You’re going to be the smartest driver in town
None – you already do them all (or you don’t drive)
What type of fuel does your car use?
Roughly how much do you spend on fuel each month?