But as Guido Fawkes reports, no one is allowed to say why.
Tom Harper, investigations reporter at the Evening Standard, said via Twitter that the story behind Briscoe's arrest is "jaw-dropping".
Watch this space...
UPDATE – Office for Judicial Complaints statement:
"The Lord Chief Justice and Lord Chancellor have suspended Constance Briscoe from the judiciary pending the outcome of the police investigation into the allegations against her. It would be inappropriate to comment further whilst the investigation is active."