I am doing a skydive for the muscular dystrophy campaign. I am doing this because my younger brother Jonathon has Duchenne Muscular Dystrophy. 
Duchenne muscular dystrophy is a neuromuscular condition caused by a lack of protein called dystrophin. It is a serious condition which causes progressive muscle weakness. About 100 boys in the uk are born with duchenne muscular dystrophy each year.
Some of the things The muscular dystrophy campaign do are fund treatment and cures, provides grants to help towards specialist equiptment to help people with duchenne to live as independently as possible, and much more! For more information on muscular dystrophy and what the muscular dystrophy campaign do vist...
http://www.muscular-dystrophy.org