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found next to English and Hybrid Bluebell (Hyacinthoides non-scripta x hispanica = H. x massartiana)
My only comment is that the "habit" is distinctly upright and if you look at the stems the flowers seem to be all around the stem and not one sided.
Chris Brooks - www.dragonfly-images.co.uk
My Flickr site - www.flickr.com/photos/ceb1298
As a extra character suggesting the hybrid, the leaves are rather wide (although difficult to judge on picture, agreed).
Lat/Lng: 53.4204, -2.5776
OS grid ref: SJ617916