There’s a bunch on Feddit.uk:

• !casualuk@feddit.uk
• !recipes@feddit.uk
• !cooking_with_fire@feddit.uk
• !ukmusic@feddit.uk
• !ukmusic_rockpunk@feddit.uk
• !rockmusic@feddit.uk
• !gamebooks@feddit.uk
• !folkhorror@feddit.uk
• !britishtelly@feddit.uk
• !britishfilms@feddit.uk
• !britishcomics@feddit.uk
• !britishhorror@feddit.uk
• !britishwrestling@feddit.uk