Thanks very much for your reply.

I have just booked a private consultation with a physiotherapist who has a hydrotherapy facilities. He's going to do the initial consultation for free and see what therapy will need to be undertaken. He said he may be able to just show us what to do in the hydrotherapy pool and we would then be able to do this ourselves in a normal swimming pool. He said he obviously can't tell me anything yet though until the consultation.