I am running the Edinburgh half marathon to mark what would have been the 40th birthday of Colin Campbell. Col was the husband of my dear friend Nicola, and dad to bumptious beauties Isla and Evie (then aged nine weeks and 22 months), when he died from Sudden Arrhymthmic Death Syndrome (SADS) on his way home from playing tennis last February. He was 38. 

Devoted to Nicola and the girls, Col was smart, funny, charming, unstintingly kind, and just a brilliant person to be around whether we were out on the razzle, or simply chewing the fat on the sofa on a rainy night in. I loved the way he listened intently as Nic and I banged on and on about work, gossip or my latest hair-raising dating story, always with a thoughtful piece of advice or stress busting quip at the ready. For the latter storytelling, and with tongue firmly in cheek, Col nicknamed me 'Wild Wharton', which never failed to make me laugh.

And so to honour this fantastic and much-missed man, and the moniker he gave me, I am offering the chance for anyone who donates £100 to dress me up like a proper fool. I will wear anything you like (bar a horse's ass - appropriate, but too heavy - or career ending Borat thong). So crank open those wallets people and dish up your worst. I'll be checking my dignity at the start line for one day only. 

But £10 or £100, anything you can give will be very, very appreciated. 

And if you'd like to find out more about Nicola's story and how she is doing, follow her at widowsdontwearblack.com. Her strength, positivity and never-ending chutzpah are an inspiration to me every single day. 

Yours,

Sarah