That is annoying, I have seen this before, but for the life of me I cannot yet put a name to it. Sorry.

Is it an Eremurus (Foxtail lily) of some variety? Seems a little early though.

Ashphodelus fistulus is the one I am thinking of. Does it smell slightly oniony?

It might be a Camassia which is a bulb and which is in flower now. Blue is the most common but there is a white/cream version. It doesn't have a scent so if yours does then I'm wrong. I may be wrong anyway!

Thanks to you all for the help in finding this plant's name.
Not an Eremurus or Camassia but looking on line with the names you've offered I do believe Owdboggy that you're right. Pics online look the same but if the weather's good tomorrow I'll take myself down there for a sniff to see if it smells of onions.
Thanks again.

I also think that is an Asphodel.

Asphodel I think to. The foliage is correct for it too.

Thanks everyone. Pics online make me think you're all right. Asphodel. Doesn't smell of onions though.