not sure what the plant is either
No identification made yet.
No interactions present.
The only eggs I know of that look like that are the yellow eggs of the Green Dock Beetle, Gastrophysa viridula. June is about right for them. I gather from Wikipedia that the beetle can feed on plants other than dock and sorrel, but rarely. Also, that the larvae can only develop fully on Rumex. So, if the plant isn't Rumex, I suppose these might just be eggs that are not going to make it to maturity.
These certainly look like Gastrophysa viridula eggs, but there are many other closely-related Chrysomelids, so it's also possible that these are eggs of a species more suited to the foodplant
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Lat/Lng: 51.3, -2.7
OS grid ref: ST5662