Polydor co-presidents Tom March and Ben Mortimer have told Music Week that Mabel is on course to be one of the year’s biggest breakouts, after current single Don’t Call Me Up gatecrashed the Spotify Global Top 10.

Don’t Call Me Up entered the streaming service’s daily Top 10 for the first time on March 26, and has so far peaked at No.9; a rare achievement for any UK artist, let alone one yet to release her debut album proper. The ...