Major major new species - Butterfly Orchid

I have just discovered that we have a Butterfly Orchid on site (almost certainly a Greater Butterfly Orchid but we can't be sure until the flowers open). It has grown very close to our only Twayblade in the West Field. In fact with its similar basal leaves I had assumed it was a second Twayblade until the flower buds formed and I realised it was something else. Orchid species #6.