"John" wrote in message
...

The stat is wireless so can be easily moved to another room but I remember
reading somewhere that there should always be one rad in the system that
doesn't have a TRV and that the stat is usually in that room,

Actually regs say it must be in that room, but you can of course do what you
like.

which in our case, it is - the radiator in the lounge is the one that
doesn't have a TRV. So can the room stat safely be mounted in another
room?

Yes but of course you can easily have the situation that the TRV and
thermostat will conspire to keep the rest of the house at the temperature
required by that room whilst the room itself is actually stone cold! And
the room without stat or TRV will have no control at all other than the
programmed timings.

--
Mike W