ANDY Coulson will "vigorously contest" perjury allegations against him if they are ever brought to trial, a lawyer for David Cameron's former communications chief said yesterday.

Mr Coulson was charged by Strathclyde Police on Wednesday night over allegations he committed perjury during the trial of former MSP Tommy Sheridan.

A report is to be sent to the procurator-fiscal which will decide if the 44-year-old former News of the World editor will face court proceedings.

In a statement yesterday, his solicitor, Jo Rickards of law firm DLA Piper, said: "Andy Coulson will vigorously contest the perjury allegations made against him yesterday by Strathclyde Police, should they ever result in a trial."

Mr Coulson was detained at his London home on Wednesday morning and taken to Glasgow for six hours of questioning at Govan police station. Strathclyde Police then announced he had been arrested and charged with perjury. A Crown Office spokesman said there was no legal obligation for him to stay in Scotland, and he was free to return to his home in London.

The former journalist arrived back at his home in Dulwich, south-west London yesterday morning, after being released by police late on Wednesday evening. He declined to speak directly to reporters waiting outside.

Mr Coulson gave evidence at Sheridan's perjury trial at the High Court in Glasgow in December 2010, while he was employed by 10 Downing Street as director of communications.

Sheridan was ultimately jailed for three years in January last year after being found guilty of perjury during his 2006 defamation action against the News of the World. He had been awarded £200,000 in damages after winning the civil case but a jury found him guilty of lying about the tabloid's claims he was an adulterer who visited a swingers' club.

The former Scottish Socialist Party leader was convicted of five out of six allegations in a single charge of perjury relating to his evidence during the civil action at the Court of Session in Edinburgh.

Sheridan was released from jail in January this year after serving one year of his sentence and vowed to continue the fight to clear his name.

Coulson was arrested last year in relation to Scotland Yard's investigation into phone hacking at the news-paper. He was held in July on suspicion of conspiring to intercept communications and corruption, and had his bail extended earlier this month. He resigned as editor in 2007 after the paper's former royal editor Clive Goodman and private investigator Glenn Mulcaire were jailed for phone hacking.

David Cameron took him into government when he became Prime Minister in May 2010, making him his key media aide. But he resigned in January last year.

Operation Rubicon detectives have been looking at whether certain witnesses lied to the court during Sheridan's trial as part of a "full" investigation into phone hacking in Scotland.