Pale pink flower in a hedgerow; scent like a jonquil

Walking through a hedgerow last night, amongst all the nettles and the flurries of the usual wild-flowers there was a patch of about two dozen spikes with these pale pink flowers around the top of each.  In this pic there are three such heads.  It has a delicious perfume, identical to that of jonquils.  What is it, please?