This will likely stop the leak, but it’s important to follow the instructions for the type of leak you have to really solve ...

You’ll need to close off the thermostatic radiator valve and the lockshield valve on either side of your radiator by turning clockwise with a spanner. Keep track of how many turns it takes to ...

What you're actually twiddling with is a thermostatic radiator valve (TRV), and understanding its function could be quite the financial trick for those eager to cut down on their heating bills.