Clean Bandit made it a third successive week at the top of the singles chart with their dance track Rather Be.
The London band's release, featuring Jess Glynne, held off all rivals and has now sold 402,000 copies, according to the Official Charts Company.
Clean Bandit - brothers Jack and Luke Patterson, Grace Chatto and Neil Amin-Smith - knocked Pharrell Williams's Happy off the top spot to score their first chart-topping single last month.
Williams climbed one place to number two today, while DJ Fresh and Jay Fay's Dibby Dibby Sound ft Ms Dynamite entered the chart at number three.
Will.I.Am and Miley Cyrus's Feelin' Myself dropped two places to number four, while Pitbull and Kesha's Timber climbed one place to number five.
In the album chart, Bombay Bicycle Club hit the top spot for the first time.
The London-based indie rockers' fourth full-length offering, So Long, See You Tomorrow, went straight in at number one, outselling their closest rival, Avicii's True, which climbed from number four to number two, by more than 6,000 copies.
Bombay Bicycle Club, who feature Jamie MacColl, the nephew of late chart legend Kirsty MacColl, on guitar already have two top 10 albums to their name - 2010's Flaws reached number eight, while 2011's A Different Kind Of Fix peaked at six.
Ellie Goulding's former number one album, Halcyon, slipped one place to number three, while London Grammar climbed three places to number four with their debut album, If You Wait. The top five was completed by Beyonce's self-titled fifth album, which dropped two places.