Caroline Flack and Harry Styles' relationship was seen as a 'car crash' by the band’s management team, it has been claimed.
According to heat magazine, the pair broke up last month after coming under pressure from record label bosses.
"It was described as a 'car crash' - someone so young like Harry being photographed leaving Caroline's house after staying the night is not exactly 'boyband' behaviour," an insider told the magazine. "Traditionally, they should appear to be single."
Harry, who turned 18 yesterday, took to Twitter to confirm reports that he had split from 32-year-old Caroline by "mutual decision.
"Harry explained that he was under a lot of pressure with work and that he hadn't ever wanted Caroline to get the kind of negative attention she's been getting from One Direction fans," the insider continued.
But the source hinted that a reunion could soon be on the cards when One Direction return from promoting their debut album in the States.
"They really are deeply in love, so this split could be more of a break while they both take time off from the madness," the insider added.