On Friday September the 16th I'll be walking 20 miles around London, in the dark, to raise money for Maggie's Cancer Caring Homes.

You can read about the great work they do here: http://www.maggiescentres.org/

I'm not doing it alone. Also walking are other members of our website team, so don't forget to sponsor them as well!

For Sherlockology, I'm the website's Locations Specialist, Photographer and Video Editor, as well as writing copy for the site and Tweeting prolifically.

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.