On Monday, Mr Dacre said he knew of no cases of phone hacking at the Mail.
The company's editor-in-chief, Paul Dacre, has denied the allegations, describing them as "mendacious smears".
Lord Justice Leveson said he would recall Paul Dacre to face more questions on accusations by Hugh Grant.
Kevin Brennan, 55, of East Yorkshire, is one of five men who deny defrauding Graham Dacre, of Norwich.
Trevor-Roper, ennobled as Lord Dacre by Margaret Thatcher in 1979, was ludicrously talented.
Previously, Mr Dacre accused Grant of making "mendacious smears" after he claimed a Mail on Sunday story came from illicit eavesdropping.
When he stepped down from the newspaper in May this year, current editor Paul Dacre paid tribute to the curmudgeonly columnist.
The court has heard Mr Dacre was targeted with promises of "huge returns" from high-yield investments that he intended to use for charity.
When Mr Dacre himself became suspicious he was warned the group had "a file on him" that could be made public, the jury heard.
Mr Dacre said the UK had one of the "less liberal" systems for publishing official documents in Europe and any "unnecessary secrecy" risked increasing cynicism about government.
The five men, along with Mr Brennan's brother, Martin, 40, of Bracken Road, Stockton-on-Tees, are also charged with laundering the money given to them by Mr Dacre.
Rusbridger also supported a suggestion by Paul Dacre, editor of the Daily Mail, for a press ombudsman who could investigate serious lapses of standards on a "polluter pays" basis.
Paul Dacre, editor of the Daily Mail, recalled in his address at the memorial service a conversation between Rothermere, a believer in reincarnation, and one of the press baron's less successful editors.
Wednesday's meeting of the Press Complaints Commission's Code of Conduct Committee will be chaired by Mail editor Paul Dacre, who was not at Monday's meeting with the prime minister because of personal commitments.
Mr Dacre, also editor-in-chief of Associated Newspapers, publishers of the Mail and the Mail on Sunday, said he would withdraw the "smears" statement if Grant withdrew his claims the Daily Mail or Mail on Sunday were involved in phone hacking.
"The aircraft had to be able to land and take off in 125 meters, it also had to have a very low noise output and the aircraft needed to be able to accelerate rapidly up to 350 mph in order to get point to point at low level very quickly, " said Avcen managing director Mike Dacre.
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