Really excited (/slightly dreading) running my first marathon in May for this fantastic charity. Medical Detection Dogs trains dogs to save lives using their amazing sense of smell. 

Dogs are the best bio-sensors. They can detect odours as tiny as a teaspoon of sugar in 2 Olympic sized swimming pools. With your help the charity can train more of these amazing dogs and do more research to give medics the tools they need for faster, more reliable, non-invasive diagnosis of cancer and other diseases.