The four-piece boyband eclipsed the peaks achieved by Louisa Johnson (2015, no9) and Matt Terry (2016, no3) as Dimelo – featuring Wyclef Jean and Naughty Boy – impacted at No2 today.
The Official Charts Company uses download sales, physical sales and streaming data to compile the list, which this week is topped by Ed Sheeran.
Perfect, which is now the favourite for Christmas Number One in two weeks’ time, rose from No3 after the Beyonce version was unveiled to an enthusiastic reception from music listeners.
Havana by Camila Cabello, which had been at number one for five weeks, drops to No4 this week, with Rita Ora’s Anywhere dropping just one spot to No3.
Mariah Carey completes the Top 5 with her 1990s classic All I Want For Christmas Is You; shooting from No22 to No5 – one spot ahead of Wham’s Last Christmas, up from No29 to No6.
The Pogues’ Fairytale of New York also returns to the Top 10 for the first time in nine years: it’s up from 55 to 10.
Elsewhere, One Direction’s Louis Tomlinson scrapes into the Top 40 with new single Miss You, new at No39.
On the album chart, Sam Smith returns to No1 with The Thill of It All, while Ed Sheeran’s Divide rebounds to No2.
U2’s Songs of Experience is the highest new entry at No5, while Pete Tong, the Heritage Orchestra and Jules Buckley’s Ibiza Classics bows at No17.
With two weeks to go until the official Christmas chart is revealed, who’s looking good for the coveted top spot?