Former MP Lord Janner has been told he must attend a hearing over allegations of child sex abuse after his lawyer said he was too ill to appear.
The 87-year-old is accused of historical child abuse over three decades.
Chief magistrate Howard Riddle made his ruling after proceedings against the member of the House of Lords began this morning at Westminster Magistrates' Court got under way on Friday morning.
In April, the Director of Public Prosecutions, Alison Saunders, decided Lord Janner was unfit to stand trial because he is suffering from a severe form of Alzheimer's disease.
But in May, six of his alleged victims asked an independent barrister to examine her ruling under the Right to Review scheme.
And in June, an independent review overturned the original ruling meaning criminal proceedings could go ahead.
The allegations of abuse date from the 1960s, 1970s and 1980s.
Sky's Tom Parmenter said: "This is a case that has attracted a great deal of attention because of who it involves and the unusual nature of how it has come about with the u-turn by the Crown Prosecution Service.
"(This is) the start of a legal process that could go in quite a few different directions - the most likely, of course, is that it is involving very serious allegations and therefore will be passed on to be looked at by a judge, probably at a crown court, probably in London at a later date.
"But the hearing is underway. Lord Janner is not in attendance. This is someone who has faced 22 allegations of sexual abuse. Allegations that he has previously denied and his family have said that he is entirely innocent of.
"Therefore this is a legal process to look at what happens next. Whether he will be fit enough to enter a plea.
"It may be that we get to a point where we have a trial of the facts, where a jury looks at the evidence without Lord Janner actually being in the courtroom, and then makes a decision.
"It is unlikely we will have trial in this case, as we know it and understand it, with evidence from both sides and an opportunity for a defendant to give evidence."
Lord Janner, whose full title is Baron Janner of Braunstone, was a QC and then MP for Leicester West until his retirement from the House of Commons in 1997 when he joined the Lords.
He has been on a leave of absence from the Lords since October 2014, as a result of his illness.