OK, Neil, thanks for clarifying that.
I love to challenge stuff like this. I would have been tempted to write back and say "I fitted the engine myself" and ask what they proposed to do in those circumstances.
Petty maybe, but it's stuff like this which adds up to more erosion of our freedoms than actual bills going through parliament do. They are open to scrutiny, civil servants are'nt!
God, that's a bit philosophical for a saturday morning isn't it?