I have removed a radiator in a room that's changing use (and there will be other things attached to the wall where the radiator was).
I'm happy enough that the lock-shield valve will be watertight and tamper proof but I'm not at all convinced about the thermostatic valve at the other end - in fact I've knocked it a couple of times and provoked a squirt of water.
Is there anything designed to cap the end or, alternatively, what's the best way to bodge it? It had a fairly large diameter union onto a short stub which in turn was screwed into the radiator. Even if I knew what size the nut is I'm not sure what one would need to make a watertight cap.