Susie Mac talks to David Wiilamson a double leg ampute who wil be doing an astonishing 30 marathams in 30 days in a wheelchair. An incredible physical and mental cahllenge to raise funds for Limb Power to engage amputees and individuals with limb impairments in physical activity, sports and the arts to imoprive the quality of thier life. Pless donate at www.justgiving.com/fundraising/dw30in30.