Hello John,
The "fat" men dressed in red were probably Simon and Andy (:-).

No clue if it was a faulty part or damaged but I would imagine damaged being the reason. I will ask them that's a good question.
JP,
Probably the best Christmas present you could have asked for. By any chance was the problem identified by a fat man dressed in red :santa2:
Do you know if the fault was a result of a faulty part, or had it been damaged at some time?