In The Garden: Pink flower with curled back petals-ID needed

I had such a fast, excellent response to my last post, that I'm thrilled to see if this one can be ID'd, too. I'm hopeless with plants . . . I'd much rather identify an animal! But I think this is ever so pretty . . . hope you guys can help.

Photograph was taken in the garden of Forde Abbey, in Somerset, UK.

Thanks!

Maedin T.

 

Martagon lily.

 

Thank you again, Ron!