Brighton has never been short of rooms where strange, brilliant and slightly feral things can happen after dark. Mutations Festival understands that better than most.
Mutations Festival Returns to Brighton on Friday 23 and Saturday 24 October 2026, the multi-venue festival is back for its eighth edition, once again taking over some of the city’s best-loved grassroots music spaces. It is the kind of festival that suits Brighton perfectly: restless, walkable, unpredictable and built around the thrill of finding your new favourite band in a room you nearly walked past.
The first headliners have now been announced, and they say a lot about the territory Mutations likes to occupy. At one end, there is Fat Dog, the kind of band that does not so much play live as detonate. At the other, Mike D 5D, a rare new project from Beastie Boys’ Mike Diamond, bringing a piece of music history into the middle of Brighton’s independent venue circuit.
Fat Dog return to Brighton with new music, new members and their usual sense of beautifully controlled chaos. Led by Joe Love and now expanded to a seven-piece, the band have built a reputation as one of the most exhilarating live acts around. Their upcoming second album, Cancel Me (I’m Tired), is due in October on Domino Records and promises a broad, unruly collision of electro-punk, rave energy, art-pop, rock’n’roll, psychedelia and other sounds that are harder to file neatly.
That feels like a very Mutations booking. The festival has always been good at catching artists at the point where the room starts to feel too small for them.
Then there is Mike D 5D. Mike Diamond needs little introduction as one third of the Beastie Boys, alongside Adam Yauch and Adam Horovitz. His new project arrives with debut solo album Thank You, released on 28 August via Capitol Records, and a live line-up featuring Mike alongside his sons Skyler and Davis Diamond, Eddie Ruscha, Will Graefe and Milo Ruscha.
For Brighton, it carries extra weight. The performance is being billed as the first live show by a member of the Beastie Boys in the city since the band played the Brighton Centre with Run-DMC in May 1987. That is the sort of footnote that makes a festival announcement feel less like a listing and more like a small piece of local music history.
The full Mutations line-up will eventually stretch to more than 90 international breakthrough and established artists, with further names still to be announced. Previous editions have brought artists including CMAT, Yard Act, Sprints, The Last Dinner Party, Wunderhorse, English Teacher, Antony Szmierek, Paris Paloma, Kneecap, Arooj Aftab, Adult DVD, Keo and Big Special to Brighton, which gives a useful sense of the festival’s instincts.
It is not trying to be a giant field festival squeezed into the city. Its strength is scale. Mutations moves between venues, scenes and sounds, giving audiences the chance to build their own route through the weekend. One set might feel like the future of guitar music, another like a leftfield club night, another like something you only fully understand halfway through and then cannot stop thinking about afterwards.
The 2026 edition will take place across Chalk, Patterns, Revenge, The Hope and Ruin, Green Door Store, Dust, The Prince Albert, Folklore Rooms and Alphabet. That venue list matters. These are the rooms that give Brighton’s music culture its texture, from sweaty upstairs spaces to bigger stages where the next step starts to look possible.
For anyone who likes their festivals compact, loud and full of discovery, Mutations remains one of Brighton’s most interesting weekends. The first names alone suggest an edition with plenty of bite, and with many more artists still to come, October already looks busy.
Mutations Festival takes place on Friday 23 and Saturday 24 October 2026 across multiple venues in Brighton. Super early bird tickets are on sale now via www.mutationsfestival.com
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