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I don't think it is common broomrape as it does not really look right. Somone mentioned on ispot that an expert is looking for unusual broomrapes so it might be worth doing a search for broomrape to see if you can find who it is and pass on this observation details.
I looked this up in David Streeter's Collins Wildflower Guide. O. minor has purple stigma lobes whereas yours are yellow. With this combination of purple flowers and yellow stigmas I can't make the key come out at anything plausible, I'm afraid.
University of Edinburgh and Biodiversity Observatory (OU)
Stace's Flora says stigma sometimes yellow for O.minor, and gives 4 different variants. So it is not clear cut.
Try Rumsey & Jury, Watsonia 18, 257-295. O. minor agg is a rather difficult group. I've sent the photo to the BSBI referee - Fred Rumsey - for a view. Will report back.
BSBI VC Recorder
Why is this linkin to the Catalogue of Life rather than the UKSI dictionary.
I see the COL has sunk O. purpurea into O. uniflora. Do the UK botanists agree?
Lat/Lng: 49.2, -2.3
OS grid ref: S^8324