Coley is running 26.2 miles dressed as a dog. That's really all that is needed on the "what" and the "how". The "why" is as follows: Leukaemia & Lymphoma Research is the only UK charity solely dedicated to research into blood cancers, including leukaemia, lymphoma and myeloma.

Their life-saving research is focused on finding causes, improving diagnosis and treatments, and running ground-breaking clinical trials for all blood cancer patients.