Unity's Preserva series of seasonal fruit sour beers take inspiration from traditional preserves; from the use of salt and coriander seed to live lactic fermentation and fruit selection. Preserva #3 gets all jammy with liberal additions of sour cherries during fermentation.
Unity brewing from Southampton and founded in 2016 have a great philosophy.... At the heart of Unity is a spirit of collectivism, where people come first (besides beer of course).