You may want to contact St Martins Community Hospital in Bath. They hold a falls group which sounds similar to the one you are wanting to set up. The address and telephone No. is as follows;
St MARTINS HOSPITAL , BATH
Midford Road, Bath BA2 5RP
Tel 01225 832383
If you ask to speak to someone from the Falls Clinic hopefully they will be able to help.
Good luck in setting up the service, Michael.