This is from Swithland woods, in shade and in a fairly damp area. It seemed to be the only one.
The flower head is on a single, completely bare and smooth, bright green stalk about 20cm high.
There seem to be a small number of small lanceolate bracts at the base of the umbel like inflorescence.
The colour is fairly accurate, perhaps a little more white than the photo.
I couldn't see what if any basal leaves there were.
Apologies for the quality of the image it was taken on an ancient mobile and had to be sent to a friend's I-phone to be returned by email.
How many petals on flower Robert? If it's 5, creamy pinkish white and in clusters maybe Soapwort (Saponaria officinalis). Just a wild guess from me but they do grow by streams in woods!
My suggestion would be sanicle.
And looking again, the lobed leaves at the bottom right of the picture would be consistent with that ID.
Many thanks, Peter, I'll try and get back and have another look. R.
I've been back and found it again. I can confirm sanicle. Basal leaves vaguely ivy shaped. Three stalked 'umbels' Tiny five petalled flowers with five long anthers unfolding from shepherds crook like formation. Two stigmas. Will post it as a record and add new and better photos. Many thanks again for all your help. R.