Hi, arrived back safely with the replacement CRT a locally produced one at that, from Teletronic, Monkwearmouth, Sunderland works.
David, thank you very much for your warm and friendly welcome and the tour around your shop, you don't know what a pleasure that was for me, being the first time up close to so many vintage TV's was such a treat.
I have removed the ION trap from the broken neck of the old tube and attached to the new CRT as you advised, aligned with pin3 and arrow pointing towards the screen.
Now I will set about removing the old screen end fit this new one, reseat the scan coils, snip C110 and give it a tickle and see what fails to happen
Chris