Jeremy Vine’s agent urged BBC bosses to stop “bullying” his client and treating him “like a child” during talks to renew the presenter’s pay deal.

Alex Armitage sent “a rather colourful email” to reject an initial offer during contract negotiations at the end of 2007.

Details of behind-the-scenes talks for Vine were revealed in evidential documents before an employment tribunal over an equal pay claim brought by the television and radio presenter Samira Ahmed.

In an email sent in December 2007 by Armitage to Roger Leatham, the then head of operations and business affairs for entertainment at BBC Vision, he said: “The BBC must now stop bullying this artist and pushing him around on this deal and listen to him. Stop treating him like a chattel and pay him properly … stop treating Jeremy Vine like a child as he is sick of it now.”

Ahmed, the presenter of Newswatch on the BBC News channel, is facing the BBC at the tribunal claiming she was paid “a sixth” of what Vine earned while he was presenting BBC One’s Points of View, a programme she argues is similar. She is seeking nearly £700,000 in back pay between November 2012 and February 2019, saying she and Vine did similar work.

The BBC rejects the claim and says the work was not comparable.

Evidence from Leatham, who is now the director of business affairs for BBC Studios, provided an insight into his negotiations with Armitage in 2007 and 2008 as the corporation tried to keep Vine in their employment.

In his witness statement provided to the media on Monday, Leatham said Armitage “wanted a three-year contract, rather than the usual two years”. He added: “Financially, Alex stipulated that the total remuneration had to be close to the offer that ITV had apparently made. We were told that offer was close to a seven-figure amount.”

Armitage also told Leatham that ITV had made “a substantial offer and that Sky and Channel 4 also wanted Jeremy for both TV and radio work”.

In his statement, Leatham said the demands made by Armitage were “challenging” for the BBC at the time as it worked to “contain talent fee inflation” because of “limited funds”.

During a central London employment tribunal hearing on Monday, Leatham said the BBC could not ask other channels what they paid talent and he had taken his conversations with Armitage “in good faith”.

“I don’t believe he was lying,” he added.

In his written statement, Leatham said the BBC put “a lot of effort into retaining Jeremy” with the then director general Mark Thompson becoming involved, something that was “very unusual”.

An initial contract offer sent to Armitage in November 2007, which included an opportunity to present the BBC Two quiz show Eggheads, was not accepted.

Leatham said: “Alex did not respond well to that offer and he sent me a rather colourful email to reject it.”

The final agreed deal for Vine, which followed further negotiations, covered him working on Panorama, elections, radio work and presenting Eggheads.

An extra “top-up” clause guaranteed the BBC would find work to the value of £100,000 for Vine or make a payment of up to £100,000 if it did not.

The corporation thought Vine could be used to work on “ceremonial events” or in other areas so the additional money could be “offset”.

Leatham’s statement said the BBC, since it knew Points of View would use Vine in 2010, was able to offset £60,000 a year for 20 episodes of Points Of View at £3,000 each against the top-up payment.

The tribunal continues.