Great stuff emmapetty, I did the Tesco's sponsored Run For Life this summer which was only 5k, my friend and I walked it as did many others - we were so unhealthy back then, me because of my weight and Jenny because she smoked 20 plus a day.
We went straight to the pub and MacDonalds afterwards, typical eh?
Now I'm losing the weight and J gave up 3 weeks ago.
Good Luck, I would be happy to sponsor you x