Ok, cancel the State funeral and mourners weeping an wailing uncontrollably, IT'S BEEN FIXED!!
I have put it back into the light fitting and switched it back on without anyone else being about, so in the end, the answer to the question of 'How many CCers does it take to change a lightbulb?' is one. Me!
....And the guy who fixed it of course.
Anyway, I need a cup of tea after that now.