plipz sponsored Nat Hannah and Hermione for a hilly half marathon by doing On yer bike over two months.
Here are the details of their pledge:
On average, how many times a week do you plan to switch from petrol to pedal power?
times (count a return journey as two)
How do you usually make this journey?
Other public transport
Scooter or moped
How long are these journeys?
miles or km (see next question)
Miles or km?