A potted (OK, cemented) history of the memorable flood years, recorded on the pillars of the Rothschilds bungalow at Woodwalton Fen:
Worth getting into an Observation. There MUST be something lurking in there!
All I can identify is Urtica dioica. (12 o’clock and 5 o’clock.)
Give it a couple of months, and Senecio sarracenicus (Broad-leaved Ragwort) will surround the bungalow - it’s one of a couple of exotics introduced by the Rothschilds, persisting but not spreading too far.