Hi all, had a quite day in work so called up the UK Garmin support number. Spoke to a rep who was not sure where the problem could be. They did confirm to their knowledge that there aren't any issues with the update. Long story short they want both the unit and GTM70 back to base to examine them. It would be useful to know was it only me and Gette who had problems; if you applied the update fine with a EU GTM70 cable would love to know.
I know they get a bit a stick but the UK help desk people could not have been more helpful, just don't bother with the E-Mail system they ignore it!!!