Its that time of the year again when I have to stick vaseline between my bum cheeks and wince for a few hours.

I am running for the The Louis Dundas Centre at Great Ormond Street Hospital and all donations will go straight to the centre.

Donating through JustGiving is simple, fast and totally 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. So it’s the most efficient way to donate - I raise more, whilst saving time and cutting costs for the charity.

So please dig deep and donate now.