A British teenager on Thursday repeatedly interrupted the start of his sentencing for murdering three young girls at a Taylor Swift-themed dance event last July, shouting from the dock that he was unwell before being removed.

A British teenager on Monday pleaded guilty to charges of murdering three young girls in a knife attack in northern England in July, a crime that horrified the nation and was followed by days of nationwide rioting.

Axel Rudakubana, 18, pleaded guilty to murder and attempted murder after attacking children and two adults at a dance class last July.

Axel Rudakubana, 18, faces a sentencing hearing Thursday at Liverpool Crown Court in England over the July 29 attack.

A UK judge is due on Thursday to sentence a teenager who brutally murdered three young girls in a stabbing spree last year that sparked the country's worst riots in over a decade.