The jury in the trial of former Anglo Irish Bank CEO David Drumm will resume its deliberations tomorrow.

After a trial lasting more than four months, only 12 of the 14 jurors who have heard the evidence were permitted to decide the case.

The expanded jury of 14 was reduced to 12 by lottery.

The jury foreman had told Judge Karen O'Connor that two members of the jury had said they would be willing to step down when the time came to reduce the jury.

However, Judge O'Connor said the law did not allow for the jury to be reduced by this method. Instead, 12 names had to be drawn at random.

Judge O'Connor thanked the remaining two members of the jury whose names were not drawn for their time and commitment to the trial and exempted them from jury duty for the rest of their lives.

The judge said they had performed an important civic duty that they should be very proud of in terms of their commitment.

She had earlier explained that the law provided for an expanded jury where a trial was expected to last longer than two months.

She said it was often the case where jurors would not be able to continue to serve due to illness or other issues and the expanded jury was there to safeguard against a trial collapsing for those reasons.

Mr Drumm denies being involved in a conspiracy to dishonestly engage in transactions between Anglo, Irish Life and Permanent and Irish Life Assurance, between March and September 2008, to make Anglo's balance sheet look better by €7.2bn.

He also denies knowingly presenting the false figures to the market in December 2008.

Before she sent the jury out to begin deliberating, Judge O'Connor continued her charge to the jury, which began yesterday.

Judge O'Connor reminded the jury members that they would have to consider the alleged offences separately and be satisfied that the ingredients of each offence had been established.

She reminded the jury that necessity did not provide a defence. She reminded the jury that "knowledge or inaction of a financial regulator or audit committee or auditor cannot make something lawful if it is unlawful".

Judge O'Connor outlined the transaction at the centre of the trial and described how €1bn repeatedly went from Anglo to Irish Life and Permanent and was later repaid to Anglo on behalf of Irish Life Assurance. Sometimes the money went in this loop in the space of two hours.

She recounted the evidence of some witnesses but told the jury members they would be relieved to hear she was not going to go through all the evidence of every witness.

Judge O'Connor said: "There can be no dispute these were challenging times most witnesses made reference to how difficult these times were.

"Northern Rock, Bear Sterns had collapsed and the St Patrick's Day massacre had seen Anglo's share price collapse."

She told the jury it would have available to it transcripts of the recorded telephone conversations heard during the trial.

Judge O'Connor said there was some language in those calls they might regard as bad language but she reminded the jury that these were "clearly very stressful and difficult times and these were persons who were under a lot of pressure at the time".

"You've heard how the funding initiatives had fallen away and there were liquidity problems so I would ask you to be conscious of that in relation to the phone calls," she said.

After deliberating for just under an hour, the jury asked to hear a recording of a phone call during which David Drumm refers to the then Financial Regulator as "Freddie F***ing Fly" when he was discussing a request for emergency funding with Anglo's former director of treasury at John Bowe. 

The jury will resume its deliberations at 2pm tomorrow.