Even less doubt now?

I think I'll have to resow somewhere "safer".  I intended a different shot, but it's not out yet.
Almost 100% guarantee it's Nettle-leaved Bellflower (Campanula trachelium). I checked it's name and found "Plug-plants" @ £1.15ea., or £0.95 if you buy more than 25.
HUH  -    (:¬o)
;¬)