EdMcC, you are right we tried most of those last night.
Dave, I thought that might damage the paint (plus the shops were shut).
In the end we removed it with a knife, turps and remnants with a nylon dishwasher scourer thing. Some damage to paintwork, but this is repairable.
Thanks Gents.
Greg
Sig: If it is such a big issue why are the WSCC, Piston Heads, SELOC, BBC, Channel 4 ... not members only?