Confidence: I'm as sure as I can be.
Notes: Critical features not easily visible, but on general appearance and geography, this is undoubtedly E. nemorosa, generally the commonest species in England. Note that the name "Euphrasia officinalis" really refers to what was formerly called E. rostkoviana in Britain. If an eyebright cannot be named to species (as is often the case), it should be called "Euphrasia sp." Alan Silverside (BSBI Euphrasia referee)