As you know, I am very interested in brain tumour research, and proton beam therapy is one of the most exciting things to have happened in that department for decades! Same for small children and hard to reach cancers. Unfortunately, there are nowhere near enough machines in the UK to meet demand but the NHS does fund travel to Prague or America for suitable patients.
I loved the report about what was needed at the Christie - the building had to be underpinned with 000s of tonnes of concrete to take the weight of the machine and a special sub-station was built to provide enough power!