Please help

Please help me raise £500 sponsorship for sadsuk As you may know I'm fitted with a defib but many people aren't so lucky as me and die as a result of not getting the right life saving treatment and defibs in public places can help save life's. So fellow challengers here's the link for my just giving page .. http://www.justgiving.com/Rob-Gundryvlm2013 On April 21st I will be running the Virgin London Marathon and it has long been a dream for me to take part in this world famous event. It will be my 2nd marathon and I'm hoping and training for a good time of sub 4 hours-3:30 which is ambitious but I need a hard target to push myself. Thankyou in advance guys