The 25-year-old, who holds the Scottish 50 metre breaststroke record, was diagnosed with inoperable brain cancer two years ago. He said: “What’s frustrating, and we welcome the Rare Cancers Bill, but that Rare Cancers Bill we truly do not believe is going to be enough to make the changes. Witney MP Charlie Maynard (Image: Oxfordshire Liberal Democrats)“The Rare Cancers Bill covers 14 different types of cancers, rare cancers. Brain cancer is the biggest killer of children and adults under 40 - and yet it receives just one per cent of the national spend on cancer research. "But more must be done to recognise brain cancer as the time-critical disease it is.