Mystery flower.

I am hoping that someone may be able to identify this flower for me.  It is about 150mm high and growing in the woodland at the end of our garden in Grange over Sands.  The leaves are growing as if from a bulb as a rosette of long thin spears (see extra).  It is the colour of a bluebell but the flower is totally different.  I cannot find a good match to it in either my wild flower books or my cultivated flower encyclopaedia so I am really puzzled but confident that someone will know exactly what it is!