A 'dangerous paedophile' who groomed two young sisters before raping and abusing them has been jailed for 26 years.

Mark Nash forced himself on one of the girls when she had just turned 13 years old and the other when she was aged 14.

And the 39-year-old showed one of the children a movie of a youngster being raped by an adult and told her 'If she can do it you can'.

Nash, who was jailed in 2004 after admitting having indecent images of children on his computer, denied all of the charges, which pre-dated the prison term.

But following a trial at Swindon Crown Court last month he was found guilty of rape, attempted rape, and other sex assaults on the girls.

The jury heard how he started by taking photographs of one of the children before moving on to indecently touching, then trying to rape her.

He was in a work lorry when he showed the girl a movie from his depraved collection and told her she should be able to do what the victim on the screen was doing.

Nash, of Awdry Avenue, Melksham, denied the offending between early 1999 and January 2004 but was convicted.

Sarah Jones, defending, said her client ended the abuse after he was arrested for having indecent images of children.

She said "He did learn, he did stop. That can be cause for optimism given the work that will be done with him in prison as he serves what must be a lengthy sentence."

Jailing him on Thursday, Judge Douglas Field said "These are very, very, serious offences.

"You set out to groom and control these two girls so that you could gratify your perverted sexual desires by abusing them.

"In my judgement they are never going to get over this. I hope that this sentencing exercise will give them some measure of closure.

"You are a dangerous paedophile. I come to that conclusion as a result of the evidence I have heard regarding these two complainants and your conviction albeit after this offending for child pornography and what I have read about you.

"It is right to remark that since your sentence for child pornography you have not reoffended."

Imposing the 26 year jail term he said "In my judgement, justly deserved for this appalling offending."

He said he must register as a sex offender for the rest of his life and abide by a sexual offences prevention order banning him having contact with girls under 16.