I have just been re-reading Jim Davidson's book about his experience with Operation Yewtree. I was struck by the fact that the stories of the first two accusers to come forward apparently matched in terms of how they claimed he assaulted them and how they claimed they reacted (bit him). I wondered how this had come about, when their stories were apparently full of holes.

Something similar seems to have happened in the Rolf Harris case. His main accuser (whose allegations corresponded to 7/12 charges) and Tonya Lee (3/12 charges) both claimed he groped them on his knee and intimately outside washing facilities (shower in main accuser's case, pub toilets in Tonya Lee's case) after lurking outside. The main accuser had various settings for her claims of abuse, including her bedroom and the seashore on the same holiday on which she was alleging the abuse took place outside the shower, but Tonya wasn't in those situations when she met Rolf Harris in a pub when her youth theatre group visited London. The setting of outside pub toilets was, apart from the claim of abuse on his lap, the only setting that came closest to what the main accuser was claiming. The main accuser's claim of abuse outside the shower was perhaps one of her most serious ones, as she was claiming to have been at the youngest age (13) at which she claimed abuse occurred. So Tonya's story would seem to have backed up a crucial allegation.

The prosecution barrister in Rolf Harris's trial seemed to imply that the accusers had no contact with each other.

"Each woman, unknown to the others, describes a similar pattern of deviant sexual behaviour," she said. "The chances of any of them making up such similar accusations in the absence of knowing each other is absurd.
www.theguardian.com/uk-news/2014/jun/10/...ts-mauled-court-told

So how did the stories end up showing a similar pattern of behaviour?

In the interview below, Jim Davidson describes his experience with Operation Yewtree (starts at around 4:33) and says he felt that square pegs were being driven into round holes. In his book, he mentions how one of his accusers had been helped by the police to change her story away from a venue he had told police he hadn't visited. In the DLT case, similar help was apparently provided too ("Mr Vullo told the jury there was "evidence" that an alleged victim, who claims she was assaulted by Mr Travis at a pantomime, had been "tipped off" by police that the Chuckle Brothers could not remember an incident she reported." source).

Also, in the letter that Rolf Harris wrote to the main accuser's father, he states that:

She [the main accuser] says admiring her and telling her she looked lovely in her bathing suit [when she was 13] was just the same as physically molesting her. I didn't know.

To me, that explains the 'he assaulted me since I was 13' allegation.

Sheba Bear wrote:
Also, in the letter that Rolf Harris wrote to the main accuser's father, he states that:

She [the main accuser] says admiring her and telling her she looked lovely in her bathing suit [when she was 13] was just the same as physically molesting her. I didn't know.

To me, that explains the 'he assaulted me since I was 13' allegation.
You mean you think she got the idea of him physically molesting her at 13 from what he wrote in the letter? If what he wrote was an accurate reflection of what she said, it's curious that at the time the letter was written she apparently wasn't accusing him of abusing her at 13 if she had to make out that him saying she looked lovely in her bathing suit was the same as physical molestation.