Agreed Lens. Fernando cycles a lot anyway, so he's not asking anyone to pay for something that he wouldn't ordinarily do anyway.
And I'm not convinced by the argument that he could do something more relevant to help his chosen charity. Should I ever find myself in need of any form of heart surgery I wouldn't be particularly happy to be told that a barrister would be performing it.
All the best Fernando, will donate as soon as my student loan is in.