High end dealers around London, UK?

I still have it on my list to visit Definitive a/k/a Living Voice. Cool, Edwardian
factory building as showroom/facility. I'm overdue for a trip to the UK, and
will try to hit it along with a visit to the Morgan factory in Malvern.
PS: Definitive is not in London, but about 200k away- probably worth the
drive if you set up an appointment in advance.

In London
HMF Solutions
33, Sutherland grove
Southfields
London
SW18 5QP

Thanks guys!