Solved Well it looks like asparagus?

Yeah, it is.
I can remember years ago it growing in my Grandmother's garden.
It was just used as something to add to cut flowers, a bit of fern, as it was called back then.

 

Another vote for asparagus. If allowed to go to fern it will also produce seeds which is probably how yours arrived!

I have a big old clump in the border which must have arrived that way. I pick some at this time for soup or whatever, then let the rest run to fern - it is tall and striking to look at, can be used in flower arrangements as @pete says and also goes an attractive yellow in autumn. Eventually it gets cut down and the whole process starts again in spring.

 

So leave to it’s own devices and cut back in autumn?

 

Yes, I would - think it would look rather good in that corner. If you decide you don't care for it, it should be pretty easy to dig up and remove this autumn.

 

Thank you!