I live in Sussex and have always called bullaces the small plum like fruits I find in the hedgerows that are larger than sloes, but smaller than damsons. I use them to make Bullace Gin using the same recipe as Sloe Gin. I picked about a pound and a half near East Dean in East Suusex on Sunday and since I've now run out of Gin for Bullace Gin thanks to ideas on this thread I think I'll make the rest into jam using a damson jam recipe. Yum
