caterpillars eating my roses!

[mike-c]

I seem to have acquired a small colony of these caterpillars on my climbing rose. Before I oust them, can someone identify them for me, please?
They are approx 12-15mm long, brown head, and speckled grey, black and yellow body.

Apologies for the poor photos, it was raining quite hard at the time!




Many thanks

Hmmm.... I don't know what's gone wrong, but I only seem to be able to post this one image - there are two more in my picture file to help someone identify them

[charlieb]

One of the Rose Sawflys, something like Arge pagana

[mike-c]

Wow!
That was quick - many thanks for the id