The celebrity chef has launched legal action against Phil Hall, the former publicist and tabloid editor, who is now chief executive at London PR firm PHA Media.
He is seeking damages over claims that his former business partner and father-in-law Phil Hall passed on private information taken from hacked emails to Hall, who then sold it on the Daily Mail.
It is alleged that the information formed the basis of stories in the Daily Mail reporting the chef's £30,000 hair transplant and also accusing him of hypocrisy after going on a shark-fishing trip after expressing outrage at the killing of the creatures in a TV show.
Ramsay had previously alleged that members of his wife Tana's family had installed keylogging spyware onto his computer in order to steal passwords and remotely access his emails.
Revelations about the email hacking emerged during a bitter dispute between Ramsay and his father-in-law, which was eventually settled in early 2011 by Ramsay buying Hutcheson out of his business empire for a reported £2m.
Ramsay's lawyers say that Hall conspired with Hutcheson to place negative stories in the press while the dispute was ongoing.
Pushpinder Saini QC, representing Ramsay, told the court last Friday: "We see at least two occasions where Mr Hall and Mr Hutcheson have colluded to reveal private information about Mr Ramsay and his family."
Sani said that Ramsay had "always suspected that someone had leaked to the press that he had had a hair transplant", and he further claimed that Hall had even "admitted" to being behind the story.
However, Hall's legal team claims that the PR man knew nothing about the email hacking, and called on the courts to strike out Ramsay's claim against him.
Justice Vos is due to make a decision later this month as to whether the case should go to trial.
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