Just by way of closure it worked!!
I was fairly confident given the condition of the old UJ but you can never be certain that there is not some other dark force at play...
I know it has been a while since I raised the original thread but there have been demands of everyday life to deal with and whilst the car was up I sorted out the other jobs I had been meaning to do such as painting the floor / chassis, a healthy dose of cavity wax, greasing, trunnion oiling, painting the exhaust with VHT paint (now that does smell when it cures!) etc.
I'm ready now for some more sunshine!