"Ellipsis" was released on 8 July 2016, entering the UK charts at No. 1. Following the successful launch of "Ellipsis", the band performed co-headline slots (co-headlining with Fall Out Boy) at the Reading & Leeds festival. The new "Ellipsis" songs featured prominently in the setlist. Between the two headline slots, Biffy Clyro also performed a huge outdoor show in Glasgow, with Fall Out Boy filling in as the support act. In November 2016, Biffy Clyro were announced as the Saturday headliners of the Download Festival 2017. This marked their sixth appearance at the festival and their first headline performance on the main stage.