The last time I completed this challenge was after I was diagnosed, but before I had chemotherapy and a stem cell transplant for mantle cell lymphoma. My life-saving treatment was successful because of research carried out into this and other cancers, in part funded by Cancer Research UK.

After my wife's diagnosis of ovarian cancer last Easter and treatment, Jane is now benefiting from a newly available drug, Olaparib. Again, this drug and the hope that it brings wouldn't have happened without research.

But research costs money.

So I'm doing this challenge again, in part to improve my fitness, in part to say f*** you cancer, but mostly to raise some more funds for this vital research.

If you can spare a couple of pounds, that would be fantastic. If not, please just cheer me on as I wander around trying my best not to bump into too many people, animals and inanimate objects.

Thank you.

Tim.