A large density of galls causing the leaf to distort.
No interactions present.
There do seem to be a large amount of these this year.
There are also one or two silk button galls caused by N.numismalis f. agamic on the lower right hand side of the leaf.
On the bend there may also be an Oyster gall. or a failed Cherry gall
Lat/Lng: 52.1049, -2.1665
OS grid ref: SO886451