(untitled)

A stand of (probably) Russian Comfrey judging by its pinkish/port wine flowers though that ID is notional. Symphytum x uplandicum is a hybrid of S. officinale and S. asperum widely naturalised having been introduced to the UK as a crop for fodder, fertiliser etc. It cross pollinates with native S. officinale so interbeeding is infinitely mutable.