Phil L wrote:
Right, here goes...it's a wild plant, IE it grows anywhere, although
it's not everywhere!
it resembles dock in size and leaf shape except the leaves are darker
green, almost bluish and hairy and more pointed.
A clump of it would easily be about 14 inches across and high....I
don't want to know for any particular reason, I just keep seeing it
and don't know what it is, googling for hairy leaves gets nowhere

Thanks to all, I think it's comfrey as suggested by K and Sue...I may
'aquire' a clump of it for the garden, I think the leaves are quite
impressive in the right setting, the flowers will be a bonus.