Thanks lads for taking the time to reply.
@outtafocus - no, i've never seen that lucasoil grease here in the UK - is it a general purpose grease or sold as an automotive product?
@Rsickles - thanks mate, i think you're right there - a niche market that's creating a void rather than filling a gap so to speak.
So then, the general concensus so far is that copper grease is copper grease regardless of brand & teflon grease is the same as any other good quality grease.
Cheers
Rick