A perverted children's supervisor from West Yorkshire who enjoyed spanking young boys in his care has been jailed for four years.

Cruise ship worker Paul Trotter, 34, made films of himself spanking the boys on either their bare bottoms or over their clothes.

He would then use the films for his "sexual gratification", watching them alone in his cabin on board luxury ships operated by Cunard, Swindon Crown Court heard.

Trotter previously admitted a string of sexual assaults on 13 boys, aged between seven and 13, and the taking, making and possession of indecent images of children.

The offences were committed while Trotter worked on board the Queen Victoria, the Queen Elizabeth and the Queen Mary 2 vessels, the court heard. Trotter also had in his possession other indecent images of children he had obtained from the internet.

Judge Douglas Field sentenced Trotter, from Pontefract, to four years in prison. He was also made subject to an extended period of four years on licence once he was released from prison.

Trotter, who was arrested while living in Salisbury, Wiltshire, appeared at court dressed in a suit and purple tie and stared at the floor as the sentence was passed.

Judge Field said he believed Trotter posed a significant risk to members of the public.

Turning to the effect on the children's families, the judge added: "They had every expectation that their children would be looked after. You have grossly breached that trust."

Trotter was placed on the sex offenders' register for life and banned from working with children.