The bullying helpline boss who claimed to have been contacted by Gordon Brown's staff has been trawling her emails for evidence to support her allegations.
Signalling she intended to stand by her claims despite attempts by senior Labour figures to discredit her, Christine Pratt has approached the publicist Max Clifford for support.
He has offered to give her guidance on the basis that she can back up her assertion that some Downing Street staff had sought advice from the Swindon-based National Bullying Helpline.
The developments threaten to keep the row over the Prime Minister's alleged bullying in the headlines.
Mrs Pratt faced heavy criticism for breaching the confidentiality of callers to the helpline. She has also come under pressure for appearing to change her story after she admitted two of the calls came from the office of the deputy prime minister - which closed down in 2007 - and that none involved Mr Brown directly.
Mr Clifford said she was now trying to assemble the evidence to back up her allegations.
"Christine came to me and asked if I would help her. I said 'I'm more than happy to give you some guidance, what you've got to do is come up with evidence of what you've been saying'," he said.
"I explained I'm a big fan of Gordon Brown's but obviously we want the truth to come out."
Asked if she was confident she had the evidence, Mr Clifford said: "That's what she said to me. There's lots of emails and in the next couple of days they will come back to me to show me clearly what they've got." He added that she was not looking to sell her story but "justify doing what she's done".
Mrs Pratt said earlier that she would not be commenting until the charity's trustees had met to discuss the situation. A number of patrons, including the Tory MP Ann Widdecombe, have already resigned over her decision to go public with her allegations.
