EXCLUSIVE: A WESSEX Water employee forced two young children to perform degrading and sickening sex acts over nine years, a court heard. Christopher Tyryk, 45, used treats like strawberry jam, yoghurts and cream to encourage two children to perform lewd acts for his self-gratification.

A jury at Swindon Crown Court heard this week how Tyryk, of Drynham Lane, Trowbridge, abused a boy and girl from 1987 to 1996.

Facing two charges of raping a girl, six charges of indecency with children and five indecent assaults, Tyryk appeared for trial on Monday.

He denies all the charges.

On Wednesday one of the victims, now a 23-year-old man, took the witness stand to detail the graphic sexual acts forced on him during a long catalogue of abuse.

Emotionally describing Tyryk's reign of abuse he said as children they were abused both separately and together. Sometimes Tyryk would make them simulate sex with each other while he watched.

The victim, who cannot be identified for legal reasons, said the abuse happened frequently but always began when he was in Tyryk's former house at an address in Trowbridge.

Tyryk would beckon the children upstairs into a bedroom. He would force one or both of them to perform sexual acts.

On one occasion the victim said Tyryk would use strawberry jam, cream or whatever he could find in the fridge as part of the sex games.

Asked by prosecutor Kerry Barker why he didn't stop the abuse until he was 13-years-old the victim replied: "Because I didn't have the bottle. I was scared of him.

"I wanted to forget about it all and didn't want to go through all this. I don't find it easy to talk about what he did to me.

"I am a very nervous person with no self-esteem. He put me through hell."

The victim said his mother once asked if Tyryk was abusing him, soon after he refused to continue with the sex acts, but he denied it because he was worried about the consequences.

Blocking the abuse out of his mind he said he didn't talk about what Tyryk had done until meeting up with the female victim in December 2001, when she told of her plans to contact the police.

Defence barrister Michael Butt said the victim's account of when the sex acts started were out of sync with the evidence.

He said the abuse could not have begun before 1992 because the children were not regularly alone with Tyryk before that point.

Questioning why the male victim denied being abused by Tyryk when confronted about the issue, Mr Butt said it was because the allegations were "all lies."

He said: "I would suggest at no stage were you the subject of any form of sexual abuse at Mr Tyryk's hands and at no stage were you present or witness to any abuse involving the other girl."

The case continues.