On Wed, 13 Aug 2008 04:25:24 -0700 (PDT), wrote:

There are no suitable adjacent places where it will fit and moving the
wiring will be a pain in the A*se - so I am looking for a wireless
product that I can fit in a convenient place without having toi do
serious re-wiring.

So you need to move the programming side from where it is to some where
accessable without re-wiring.

I assume the current room stat will remain accessable and is in a sensible
place. Replace that with a wired programmable thermostat, wiring out the
switches that were in the programmer. This gives both temperature and time
control for the heating.

Time and temperature control of the hot water has me stummped at the
moment you can find wireless cylinder stats but I've not found one that
does both temperature and time control.

I've not thought this fully through but you might be able to move the
exsiting controller nearer and accessable to the cylinder stat and use the
orginal cylinder stat and programmer wiring for connections back to the
boiler. This will require 3 core and earth between the existing
programmers location and cylinder stat (Live feed, switched live back,
neutral and earth).

--
Cheers
Dave.