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Look up "decorator's cap". You can (should) unscrew the thermostatic valve on the left and attach a cap in its place which keeps the pin held down so that the valve doesn't open and leak water all night onto your wooden floor causing the floorboards to all warp in strange directions. Don't ask me how I know this.
The valve on the right is the lockshield, just turn that all the way off.
Cheers.
This is what we're working with. Tvr on one side, dumb valve (I assume) on the other. The rad is only a few months old.
What does
mean?
Specifically the word "properly".