Thanks for making the interactions link. Great.
You don't have a better picture of the plant, do you? It ought to be good enough for the plant to be identified in its own right if at all possible.
University of Edinburgh and Biodiversity Observatory (OU)
My book says 'nematus ribesii'.
Lat/Lng: 51.6691, -4.8705
OS grid ref: SN015006
Once again, these sawflies are devouring the leaves from my gooseberry bushes - an annual occurrence over the last few years