Alice, what great sites! I'll read more when I have some time but they're sure to be useful.

I thought at first you were right about the rose midge but reading a bit more it's close but no cigar. These things are green, about an inch long and leave a hole into or out of the bud. They don't seem to have effect on the leaves or stems.

It looks more like the description of the rose tier, although I hadn't noticed a black head and they don't touch the leaves at all.

I'll read more tomorrow, at least now I feel like I'm on some kind of track.

Thanks everyone

Duckboots