Prosecutor Graham Russell told the court the woman was raped by Harman earlier this year in her own home while she was heavily under the influence of alcohol.

She had been drinking with a group of people at a bar in Warwick and had been helped home by another man.

When Harman was arrested he said he had been very drunk, and accepted he had been aroused when he saw her on the bed, but did not know what he did after that.

He entered his guilty plea on the basis that because of how much alcohol he had consumed, he could not remember having any sexual contact with the woman, but accepted the evidence of her daughter.

Mr Russell said the incident has put a huge strain on the woman’s relationship with her partner.

Graeme Simpson, defending, said: “Because Mr Harman can remember nothing about the offence itself, I’m somewhat hindered in the mitigation I can put forward.

“It is quite clear he was very intoxicated indeed. He is 50, with no previous convictions.”

Recorder Mark Wall QC told Harman: “You raped somebody in her own home at a time when she was particularly vulnerable, in that she had had so much to drink she was virtually unconscious.

“And what I can’t lose sight of is that her daughter, who had to witness part of the rape you carried out on her mother that evening, now is afraid to use the toilet in the room in which this offence occurred.”