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Have you pics of the whole plant, too?
University of Edinburgh and Biodiversity Observatory (OU)
... Cichorium intybus is the commonest of the blue cichorioid daises (Cichorium intybus, Catananche caerulea, Cicerbita spp., Lactuca spp. (pro parte), but it's not easy to tell which this is from a face on view of a single capitulum.
Lat/Lng: 52.948, 0.79
OS grid ref: TF875426