Is this White Helleborine?

Is this White Helleborine?

Observation - Is this White Helleborine? - UK and Ireland. Description: Creamy white flowers. I found more developed plants later that were taller but the flowers were not opened out much more. Very calcareous soil.

Creamy white flowers. I found more developed plants later that were taller but the flowers were not opened out much more.
Very calcareous soil.