Colin Fox said Mr Sheridan wanted him to lie on his behalf The leader of the Scottish Socialist Party (SSP) has told a court that he refused a request from Tommy Sheridan to lie for him.
Colin Fox also told the High Court in Glasgow he was “sick to the stomach” at being described as a scab after the former MSP’s defamation trial in 2006.
Mr Sheridan and his wife Gail, both 46, are on trial accused of perjury.
The couple deny lying during his successful defamation case against the News of the World.
Mr Sheridan won £200,000 in damages after the newspaper printed allegations about his private life, claiming that he was an adulterer who had visited a swingers club.
After a police investigation, Mr and Mrs Sheridan were charged with perjury.
Giving evidence on the fourth day of the trial, Mr Fox said he saw a newspaper article describing him as a scab in the days following Mr Sheridan’s successful defamation case.
He said the description made him feel “sick to the stomach”.
Mr Fox also claimed he had earlier been asked by Mr Sheridan to make a statement denying that he had heard the former party leader admit to visiting a swingers club in Manchester.
Mr Fox said he refused and described the strategy as a “train wreck”.
It is alleged that Mr Sheridan made false statements as a witness in his defamation action against the News of the World on 21 July 2006.
He also denies another charge of attempting to persuade a witness to commit perjury shortly before the 23-day legal action got under way.
Mrs Sheridan denies making false statements on 31 July 2006, after being sworn in as a witness in the civil jury trial at the Court of Session in Edinburgh.
The trial, before judge Lord Bracadale, is due to last between two and three months and is expected to become the longest perjury case in Scottish legal history.
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