Updated on Apr 23rd 2011 at 10:30 PM from the JustGiving API

Thanks to everyone who's donated. It means an awful lot.

Yes, this is a bit nuts. Hear me out.

I'm going to walk as many Tube lines as I can, overground, from end to end, in 2011. I think the longest one-day walk will be the Northern line at about 26 miles - unless I do the hardest options on the District line, which will top 30.

Those who know me will know that I am monumentally physically unfit. I've never challenged myself physically before. I've always been too busy trying to stay well mentally, challenging myself in other ways, getting and staying sane, and Mind has been a big part of how strong I've become.

Now it's time to give them something back - and to try and get my arms and legs in an even better shape than my brain.

You can follow my progress at A series of Tubes.