My Sunday is taken from the band's second full-length album Colic, which will be released on October 23 through Hatch Records. Then Thickens began life as a bedroom project by former Kong frontman Jon-Lee Martin, before The Bronx drummer Jorma Vik convinced him pursue it properly.

This led to last year's album Death Cap At Anglezarke and saw the four-piece - whose line-up is completed by Charlie Hartley, Sean Doherty and Thomas Griffin - perform alongside Biffy Clyro, Echo & The Bunnymen, Vennart and Mariachi El Bronx.