Well - I thought you all may like an update!!
So, 11 (yes - eleven) days in and still no resolution to the problem.
It really is getting to be a bit of a mickey take - even the forum moderators would seem to have given up on it; is it really that difficult ???
BT - should that stand for Bl**dy Terrible !
OK - sorted (at last - only took best part of 3 weeks !!
Thanks go to Dean (forum mod) for sticking with it - seems to have been a Yahoo problem.
Onwards and upwards