Jimmy the plumber guides you through the process of changing a thermostatic radiator valve (aka a 'TRV'). As he points out in the video, you can also follow this process if you are looking to add a TRV to an existing radiator.
Jimmy takes you right the way through the whole process from what to do before you actually remove the old valve, to what you should do once the new valves is on.
By watching this video and following Jimmy's well-explained instructions, you should have all the information you need to tackle this relatively simple job yourself!
Article by Benjamin Clarke