Thanks RR,
The biggest problem is that there is a void between the two parts so I need something that'll both fill the void and bond the 2 parts together at the same time.
Spoke to 3M this afternoon and they've recommended one of their products, DP490. It's black, fills voids, sets hard, is oil resistant, has a very high adhesion factor and is designed to be used with carbon fiber. Sounded ideal so I've ordered some.
Fingers crossed and all that!
Cheers, Neil.