In aid of Cancer Research UK, 400 lucky/crazy (delete as appropriate) individuals will get to abseil the 130ft down one of Battersea Power Stations iconic chimneys. Participation will take about an hour, including ascending the old staircase, getting fitted with the relevant equipment at the top by trained instructors, and zooming down again outside.
All you need is a £30 registration fee, a minimum of £200 in sponsorship and, yes, a certain amount of bottle.