A married male nurse accused of rape today said a 16-year-old overdose patient forced herself on him in a hospital toilet.

Oliver Balicao, who has two children aged seven and nine, admits sleeping with the depressed girl after she was admitted for a paracetamol overdose.

The 34-year-old, who faces a charge of rape, said the teenager encouraged him to have sex while he was taking her to use the toilet late at night.

Taking the witness stand today the Filipino staff nurse, who has admitted one count of sexual activity with a child by a person in a position of trust, said he let a lot of people down by his actions at Oxford's John Radcliffe Hospital on March 12.

The girl, who cannot be named for legal reasons, claimed Balicao groped her while she was feeling drowsy in bed and then lured her to the lavatory on the pretext of needing a urine sample.

However, the father-of-two told Oxford Crown Court that a sample was needed because blood tests revealed she had a high white cell count.

He said by testing her urine it would allow him to find out whether this reading was because of an infection.

He told the jury that she had produced a sample on her first visit to the toilet and he then helped her again to the facilities when she said she needed to use the lavatory again.

"She called my attention and she asked me if I could give her a hand inside the toilet," he said.

"I went in and she approached me and put both arms around my shoulders and started kissing me.

"I was surprised and shocked. I kissed back."

Defence counsel Brian Stork asked: "Was that the right thing to do?"

A nervous looking Balicao replied "No sir."

"I was overwhelmed, I'm surprised and shocked about what happened and what she did, I did not think properly and I made an unwise decision.

"I'm really ashamed of it," he answered.

He added: "I'm really ashamed of it and I regret it. I let down lots of important people, the patient, her family, my family, my job, the hospital, me being in the UK and especially my nursing profession."

During cross examination the dark haired defendant accepted his alleged victim was "not a bad looking girl" and she was vulnerable because she had problems at home and was being bullied at school.

However, he denied groping her in her bed saying the only time he touched her on the ward was to remove E.C.G electrodes from her chest which he said he did with her consent.

Speaking of what happened in the disabled toilet he said: "What I have said, on my heart, is what happened.

"It was all consented to, I did not force her."

Balicao, of Lerwick Close, Bicester, Oxon was dressed smartly in a dark suit and grey shirt during the third day of his trial.

The trial continues.