On 17th April 2011 Stewart will run his first marathon.

Stewart, for those of you who don't know him, is not sporty. Ask him who he supports, and he'll think you're talking about alimony. And yet he has taken it upon himself to run 26 and a bit miles through London. No-one knows why. It's one of those mysteries.

Whatever got into his head, he's not likely to do it again. So we all might as well get him to raise some money for charity whilst he's at it.

JustGiving: simple, fast,  secure. Your details are safe with JustGiving – they’ll never sell them on or send unwanted emails. Once you donate, they’ll send your money directly to the charity and make sure Gift Aid is reclaimed on every eligible donation by a UK taxpayer.