The trial was postponed on two occasions last year because of Lady Donaldson’s health.
At a hearing last week, Judge Paul Ramsey declared the 60-year-old unfit for a conventional trial under the Mental Health (Northern Ireland) Order.
Under a trial of the facts, she will not participate in proceedings.
Last month, the Northern Ireland Attorney General, Dame Brenda King, issued a warning about social media posts.
She said people could be found in contempt of court, punishable by up to two years imprisonment, for comments which prejudice proceedings.
“Further, it is a criminal offence to identify the complainants, who must remain anonymous,” she said in a statement.
The police also advised people against publishing “speculation” online, or anything which could “directly or indirectly” identify the complainants.
