I know I know. It is totally ludicrously implausible but I am planning to run the London marathon in April, and it's looking pretty darn tricky.

All the money I raise will go to Mind, a charity for people with mental health problems, which does incredibly worthwhile work helping people who really don't get half the support they need.

You can read about my efforts to go from couch potato to er able to put one foot in front of the other, on my blog on http://blogs.telegraph.co.uk/laura_donnelly

Or you can go crazy (oops) and read a feature about it http://www.telegraph.co.uk/search/?queryText=laura+donnelly

But why not save yourself the time and forego the endless begging emails from me and just put your hand in your pocket now?

Here's the blurb: Donating through Justgiving is quick, easy and totally secure. It’s also the most efficient way to sponsor me: Mind - The Mental Health Charity gets your money faster and, if you’re a UK taxpayer, Justgiving makes sure 25% in Gift Aid, plus a 3% supplement, are added to your donation.

So just do it! I really appreciate your support.