& Leeds Festivals. Biffy Clyro also headlined the second day of the annual Radio 1 Big Weekend festival on 25 May 2013 in Derry, as well as the Cape Town and Johannesburg legs of RAMfest 2014. Simon Neil was interviewed by NME on 6 January 2014, and announced a planned Opposites b-side compilation, entitled Similarities, for release later in the year. Being interviewed for the article, lead singer Simon Neil stated that the band had come up with "six or seven" riffs for new material, although he did point out that their next album would not be recorded until at least 2015. Similarities was later released on 18 July 2014. 2016–2018: Ellipsis The band announced that 2015 would be their 'year off.' In an interview with 3FM in June 2014, Neil stated that "[the band] will take a quiet year next year and disappear so people don't get sick of the lovely Biffy." In the same interview he stated that they were working on about 19 new songs, but felt it was too early to play them live. He confirmed that a new album was coming, most likely towards the end of 2015. The first single "Wolves of Winter" was exclusively played as Hottest Record on Monday 21 March 2016 on Radio 1. On Monday 21 March 2016, during the live premiere of "Wolves of Winter" on Hottest Record on Beats 1, Zane Lowe, Neil announced that the band's new album would be titled Ellipsis. The album, due for release on 8 July 2016, was made available to pre-order in a limited edition box set on the Biffy Clyro web store. 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. To coincide with these headline performances, a U.K. arena tour was announced with Brand New announced as the support act. The tour culminated in a performance