Rolf Harris's sex abuse trial has heard emotional testimony from a woman who says the entertainer assaulted her when she asked for his autograph when she was just seven or eight years old.

The woman said she was excited and smiling as she approached Harris for an autograph at her local community centre near Portsmouth, in southern England, after he had performed his hit song Two Little Boys.

Out of nowhere, she said, he put his hand down her back and between her legs.

She told the jury of six women and six men that the television star then did it a second time.

Fighting back tears the witness said she "wasn't the same child" after the incident.

Harris's defence counsel suggested the entertainer had never been to the community centre in question.

The 84-year-old is facing 12 counts of indecently assaulting four girls between the late 1960s and mid 1980s.

He denies all of the charges.

Witness says Harris evokes physical reaction 40yrs after assault

Another woman told the London court that 40 years after he allegedly groped her she still has a physical reaction whenever she sees him on television.

The woman said she was 13 or 14 and working at a celebrity event in Cambridge when she heard a strange sound.

She said she found Harris on all fours barking at a dog, playing up to a crowd.

The witness said after that Harris approached her and ran his hand up and down her back and then began to grope her buttocks.

She said she still could not bear to see any image of Harris.

She rejected the defence's suggestion that if the event happened it was not Harris who touched her.

Earlier this week the London court heard allegations from a separate woman who said she had been abused by Harris over a 16-year period.

The woman, who said the abuse first began when she was on a holiday with the Harris family as a 13-year-old, is the main complainant. Seven of the 12 charges stem from her allegations.

Harris does not deny that the pair had a sexual relationship, but insists that it began when the woman was 18.

His defence earlier in the week told the court that the pair had a "sexual chemistry".

However, the woman denies this, and has told the court her alcoholism stems from Harris's abuse.