The hearing in London before the Master of the Rolls
, who heads the Civil Division and deals with the most difficult and sensitive cases, is scheduled for June 24-25.
It was agreed that she would continue receiving the drug - said to halve the chances of a recurrence of her form of breast cancer - pending the ruling by the Master of the Rolls
Sir Anthony Clarke, Lord Justice Brooke and Lord Justice Buxton.
The Master of the Rolls
says that the number of low-level claims - for things like tripping over broken paving slabs - rose by nine per cent last year to reach 110,000.
Lord Phillips, the Master of the Rolls
, said that two High Court judges were right last month to rule in favour of a test case brought by 36 military witnesses.
O'Callaghan's counsel was due to have his challenge of an earlier High Court judge's decision to throw out the case heard by the Master of the Rolls
, Lord Woolf, and two other Law Lords next Tuesday, but the hearing has now been postponed on a technicality.
Lord Dyson, the Master of the Rolls
, and two other appeal judges opened up the possibility that the royal correspondence could soon be revealed to the public gaze.
However, the Master of the Rolls
, Lord Dyson, pointed out that Finnigan, from Sunderland, had been able to communicate well enough to sell cannabis to undercover police officers and dismissed all his claims as groundless.
Master of the Rolls
Lord Justice Dyson said: "The core information in this story was a public interest matter which the electorate was entitled to know when considering his fitness for high public office.
He was the Chancellor of St Asaph and Master of the Rolls
to Charles the First.
However, the Lord Chief Justice Lord Judge, Master of the Rolls
Lord Neuberger and Lord Justice Sedley ruled the High Court judge had "erred in his approach" and allowed Mr Singh's appeal.
But Lord Justice Laws, sitting with Master of the Rolls
Lord Clarke and Lord Justice Waller, rejected any suggestion that the scheme was "in truth only a charade, the product of a settled intention by government to set a formula which would yield a zero figure for compensation".
Sir Anthony Clarke, the Master of the Rolls
who heads the civil Court of Appeal, called for comments from the legal profession on a new protocol to try to avoid large numbers of homeowners facing court action because of mortgage arrears following the credit crunch.