The future availability of any new or novel treatments on the National Health Service would be subject to large scale clinical trials demonstrating the safety and efficacy of the treatment approach and subsequent assessments of its cost effectiveness for routine use. NHS England welcomes the development of new technologies that have the potential to improve clinical outcomes and has established a national process to enable decisions to be made about whether such technologies should be routinely available to patients in England. The document at the following link sets out the process, including how to submit new proposals, which would be the next step in relation to MRI-guided thermal laser ablation treatment for brain tumours. https://www.england.nhs.uk/wp-content/uploads/2017/09/spec-comm-service-development-policy.pdf