Justin Bieber: Late Arrival At O2 Angers Fans

Justin Bieber has incurred the wrath of parents after turning up nearly two hours late for a sold-out concert at London's O2 Arena.

By the time the 19-year-old singer went on stage at nearly 10.30pm, parents were waiting outside the venue expecting to pick up teenage Beliebers, as his army of fans are known.

Other parents left after just a few songs with their heartbroken children for fear of missing the last trains home on a school night.

Fans apparently tweeting from inside the venue, where the doors opened at 6.30pm, said the booing started an hour before he finally took to the stage.

Many at the O2 voiced their anger on Twitter, saying the star had let down his fans.

One mother, Emma Harman, from Kent, told Sky News she was "disgusted" after her husband had been left waiting with her nine-year-old daughter, who had been brought to the concert as a birthday present.

"I am hoping he will be ashamed of his behaviour, but I very much doubt it," said Mrs Harman.

"My husband has left now having seen three songs."

Father Wayne Parsonage tweeted that he ended up missing Bieber's performance so he could make the last train home, and later added: "Discusting!! Waste of mytime and money...never again."

Former Coronation Street actor Wendi Peters tweeted that Bieber had finally come on stage at 10.24pm - nearly two hours after the advertised time of 8.30pm.

She wrote: "I shall have an extremely moody daughter tomorrow ... Livid!!"

The O2 later tweeted from its own account: "Justin Bieber is now on stage and apologises for the lateness of his show."

It pointed out that the Tube trains would still be running by the time the gig ended, but did not give a reason why he was late.

Bieber is reportedly expected to face a fine after his late performance broke a noise curfew.

Hours before the gig, where tickets started at 57.65, he was tweeting to his 35 million followers: "Tonight will be fun. Day 1 at the O2 Arena in London!"

Bieber has been seen partying into the late hours since arriving in London and at one stage was pictured wearing two watches.