Cancer Research UK lists many but not all trials. (I have not checked whether they cover any trials regarding ' Tulsa Pro'.) Another possibility is to contact UCLH in London who have a specialist who investigates various forms of Focal Therapy and would know the latest about where this is being trialled even if not at UCLH as yet. Another possibility is to contact the manufacturer of the equipment who should be able to advise where the treatment is being used/trialed (see links in earlier thread linked to by Lyn, although others may now be doing the procedure). I think at least you will need to get the support of your GP and most probably your diagnosing Hospital who will have to supply your histology and scans which you can request, so a check can be made as to your suitability. Also, if within a trial, you will have to meet various conditions and restrictions of the trial criteria and that they are recruiting.
Are you prepared to go abroad for Tulsa Pro if it cannot be done within the NHS or privately in the UK?