cpemma wrote:
http://www.cpemma.co.uk/flower1.html

TIA. Growing in South Yorkshire, hardy perennial?

It looks like some sort of a crocosmia or montbretia (whichever is the
official name, these days). If that is the case, it is a bulb which
flowers each year - lavish no tender loving care on it at all, and it
will spread into a nice big clump.

Cat(h)