Well the good news is that it will be low voltage. The bad news is
that it will probably be 230V "low voltage".

eh ? low 230V as in not 415V ? elaborate.

Indeed.

If you're thinking of the around 12V sort of mark, that is officially "extra
low voltage".

£5.99 vs at least £20 for a digital version, it's cost effective for me
and any future cost
effectiveness can be dealt with by the new owners. all I really need to
determine is the
cable run in relation to the various regulations.

Well if the cable run is simple, then there's nothing to worry about. I
would only use an RF stat if a wired one was not possible. Remember that a
mechanical stat can't work on a twin wire installation. It requires 3 wires
including a 230V supply from the programmer, which may not available from a
combi.

keeping it simple and cheap is the prime mover, adding a £100 RF stat does
not make any sense within this context and as the walls have to be re
decorated
anyway, chasing the walls out and running themover with a trowel full of
jollop
isn't really a problem.

Well, if redecorating is not a problem, then you can't beat wires for
reliability.

Christian.