Former Fianna Fáil senator and councillor Don Lydon has been discharged from the corruption trial of businessman Jim Kennedy and three other former councillors.

Judge Mary Ellen Ring told the jurors in the Circuit Criminal Court that following the resolution of some legal matters Mr Lydon's case will no longer be a matter for their consideration.

The trial of the other four defendants continues.

Earlier, former lobbyist Frank Dunlop admitted obscuring diary entries relating to developer Owen O'Callaghan before handing them into the planning tribunal.

Under cross-examination Mr Dunlop said the concealed entries referred to meetings with Mr O'Callaghan and the late Liam Lawlor regarding a proposed stadium at Neilstown.

He said he regarded these matters as personal business matters and not of significance to the tribunal.

He said he had an agreement to get a 25% stake in the project but was later paid around £95,000, with £100,000 expenses.

Michael O'Higgins, SC, for Mr Kennedy, 66, with an address at Queensway, Gibraltar, said the planning tribunal had to get the FBI and British forensic experts to uncover some of the entries which were compared to a Jackson Pollock impressionist painting by Mr Dunlop's own barrister.

Mr O'Higgins said Mr Dunlop had shown treacherousness to the tribunal even after claiming to be on the straight and narrow.

Mr Dunlop said he rejected that.

Later he told the court that the planning tribunal had accepted his evidence in the vast majority of matters.

Mr O'Higgins said Mr Dunlop was living in cloud cuckoo land if he believed that.

Mr O'Higgins also asked if Mr Dunlop had been requested to make a statement to the Criminal Assets Bureau about Mr O'Callaghan's development at Quarryvale, for which he received £1.8m.

Mr Dunlop said it was his recollection that he was not asked but said it was possible he had instructed his lawyer that he would not make such a statement.

Mr Dunlop has testified that businessman Mr Kennedy gave him £25,000 to bribe councillors for the Carrickmines rezoning during the 1990s.

Mr Kennedy and then councillors Liam Cosgrave, 57, with an address at Blackrock, Co Dublin; Colm McGrath, 56, of Saggart, Co Dublin; and Tony Fox 72, of Churchtown, Dublin, deny charges of corruption.