<p>I'm taking on over 6 marathons-worth of walking in 10 consecutive days around Great Britain this April to help children beat blood cancer.</p> <p>Since my first walk in 1985 the survival rates for&nbsp;the most common form of childhood leukaemia&nbsp;have risen from 20% to over 90%. And that&rsquo;s thanks&nbsp;to people like you fundraising for research.</p> <p>It&rsquo;s the people on the walk; the patients, the&nbsp;families, the ordinary people who want to do&nbsp;something extraordinary, who have raised&nbsp;&pound;13million with me since I began walking. Every&nbsp;step that you take is a step closer to beating&nbsp;childhood blood cancer.</p> <p>It was back in 1977 when I was in hospital with&nbsp;a foot injury, that I met a group of children with&nbsp;leukaemia. They all looked so normal and I was&nbsp;horrified to hear that none of them were expected&nbsp;to survive. It was then that I vowed to do&nbsp;something to help.</p> <p>Since I began walking, huge progress has been&nbsp;made, but we need to keep improving treatments&nbsp;to give every child the chance to live a normal&nbsp;healthy life.</p> <p>We&rsquo;ve still got a way to go.&nbsp;I won&rsquo;t hang up my trainers until we have beaten&nbsp;childhood blood cancer but I need your support.</p> <p>Sir Ian Botham</p>