Alan
There are many franchise locksmiths operating in the UK.
I've never operated a franchise myself but have met many locksmiths that do and to be honest I cant remember any of them being very positive about it.
Maybe someone on here has or is operating one and can give an inside perspective on it.
Talking about franchises reminds me of a job I was called out to, to do a lock change, some years before the client had lost her keys and called a franchise locksmith who had drilled the deadlock open and fitted a repair plate with DYNO LOCKS on it in dirty great letters, as the client hated it I offered to replace it with a plain one FOC
Mark