Rinse the Bullace berries and remove any residual stalks, leaves and any foreign bodies. I once received a beautifully wrapped home made bottle of Sloe gin for Christmas that in addition to the sloes contained a large bluebottle fly. Needless to say that was a food adventure that wasn’t going to happen.
Leave to infuse, this needs to be at least 3 months but for as long as you like.
Once you can wait no longer either serve or strain through wine filter paper and re-bottle.