In order to decorate, i want to remove a radiator that has a
> thermostat. My diy guide only gives advice on radiators not fitted
> with one and it does not look obvious how to remove it. Any
> suggestions?
Same as for non-thermostat radiators, with one extra.
You need a 'service cap' which replaces the body of the thermostat and converts it into a normal valve, so it can be turned off completely. Sod's Law states that you will not have one, I think a previous thread mentioned where to get one, if not try your local plumbers merchant.
Packing out the space between the head and the valve with small coins to force the valve shut has also been mentioned.
'Frost Protection' setting (normally '*') is probably all right in the summer, but refer to your copy of Sod's Law.
HTH Dave R