Ah well the rads are in with no leaks😀 I actually think the problem is the fittings, Toolstation ones by the way, as those I have had a while all fit nicely. Anyway plenty of time before I replace the rest as the gaffer says what a stupid time of year to have the heating off.Very strange would think it's just one of them things combination of slightly bigger od tube or smaller is fitting etc
One of the few times I agree with her🙄