Overview
- The woman, who is in her 50s, was arrested on suspicion of trespass in the early hours of Sunday, 7 June after remaining inside the Palace of Westminster for several hours following an organised tour and was later released on bail.
- Media reports say she hid in a Westminster Hall toilet cubicle marked 'under maintenance' and did not emerge until about 2am, though that account comes from press reporting rather than an official timeline.
- Unverified claims in some outlets allege night-duty Post and Patrol officers failed to detect the visitor because they were asleep, but parliamentary authorities and the Metropolitan Police have not confirmed those allegations.
- Officials have denied that the visitor reached the Prime Minister's office and police do not appear to suspect any malicious intent in the incident.
- The episode has added to scrutiny of estate security after earlier failings and the departure of the Director of Parliamentary Security, and the review will examine how Post and Patrol officers who guard the building interior and Perimeter Officers who protect the outside carried out their duties.