Does anyone know what this plant is?

is it a type of smilacina? did it emerge slightly hooked over like polygonatum?

I'd say it's Veratrum genus.

I've just added a photo of a bed of these but I don't know if this link will work.

http://www.growsonyou.com/photo/slideshow/71521-veratrum-nigrum

Veratrum viride.

I camre across these last year at an NGS garden in Oxfordshire. They were as big as a large Hosta and looked fantastic.