Update:
So, I did it! Clocked in at 3:34 for my first (and definitely last) marathon. The first 2 hours were lots of fun and the last 90 minutes were pure hell. I can't move my legs. It was an amazing experience that I'll certainly remember for many years to come. Thanks to everyone who's donated so far. Along with the Union Chapel concert we've raised over £4000! The donation page is still open so any contributions will be much appreciated.

CLIC Sargent help young people and their families deal with the impact of cancer and its treatment. They provide clinical, practical, financial and emotional support to help them cope with cancer and get the most out of life. Visit the website here: http://www.clicsargent.org.uk