I have finally got around to removing an old damaged Stelrad radiator - I have an identical one waiting to go on the wall but despite using a fair amount of force, the connectors don't appear to want to come off. Looking inside them, the olive seems quite damaged anyway.
Is best practice to buy a new pair of these - and what should I ask for if so? I can get whatever measurements I need from them but am unsure what is important.
Here are some pictures of the connections. Obviously these are the bottom of the radiator - I have inverted it to show more clearly.