On Wed, 12 Apr 2006 00:22:08 +0000, John Stumbles wrote:

If you take the plate off and it looks like this
http://i1.tinypic.com/v7b2o3.jpg
(give or take detail of the knobs) then I think it's a valve sold under
the name 'Sol' by BES and Biasa ("traditional thermostatic shower
valve 31-241") by Bathroom Express (and maybe others).

PS Bathroom Express (who seem to identify themselves on the phone as
'Pegasus') are on 01633 244699. Their website didn't have the valve
on it when I fitted that valve a year ago so you probably need to phone
them.