Whether an assessment of the benefits of proton therapy for childhood cancers has been carried out.

The Department of Health published proposals in October 2012 for the NHS to invest £250 million in building proton beam therapy facilities at the Christie Hospital in Manchester and University College London Hospital, to develop a UK proton beam therapy service. This summarises the evidence of benefits of proton therapy: http://www.dh.gov.uk/health/2012/10/proton-beam-therapy/.
With regard to current patients, due to the small numbers involved arrangements are in place on a UK-wide basis to collect, collate and report on outcomes for all UK patients, including children, who access proton beam therapy. The audit is ongoing, and it is expected that, given the long-term outcomes being measured, meaningful outcomes data will be available in 5 to 10 years.