Welcome aboard Prim.
That is definitely a Datura.
Datura flowers point up. Brugmansia on the other hand hang down.
That is the most macabre seed pod that I've seen on a Datura though!!

Thanks for that meanie do you think I should leave it and see what happens or get rid?
Prim

As most will tell you here Prim, it is poisonous, look up wikipedia.Yours could also qualify to go on Dr. Who ! :o)

It's poisonous if injested, and contact with skin can cause a rash for those with delicate skin or a skin condition.
Leave it unless you have small children about.

It might be Datura ferox:

http://www.iewf.org/weedid/Datura_ferox.htm

though I have no idea if that is found in the UK.

Thanks for all your help, yes it is the Datura ferox without a doubt.
Many thanks Prim

I'd be happy to do a seed swap if you're interested!!

I would be happy to send you one of these seed pods (well packaged) I will leave them on to ripen as long as possible and let you know how it goes
a bit later on.

I would feel uncomfortable if it weren't on a swap basis!

Okay thanks that's nice of you, my garden is on a hillside very free draining and rocky, beautiful in spring but finished by August unless it likes hot & dry, but I will have ago at most things.