From Chrysalis:

We want you to play a part in reaching a total of 2000 miles. Heres what were asking you to do: Commit to as many or as few miles as you want Ask friends, family and colleagues to sponsor you Collect sponsorship money Enter your weekly total on our webpage (final date for entries: Weds 31 August) Donate the money you've raised to our Just Giving Page Sit back and revel in your achievements.