FGN,
No he was wearing Green Headsets.
He did take some advice from a Lawyer and he sent them £700 in settlement of the invoice. the company banked the cheque and as far as I know did not pursue him for the balance. (to date that is)
Still a tube cost about £25 and I could normally have the job done in well under an hour, the organisation had a 30 minute flight in a PA28 there and back so I suppose they were covered with £700.
But if you are prepared, the cost would be well less than £100 as long as there was no other damage.
Tony