Briefing by a senior Met officer on the double murder in Highgate and the other murders committed in London allegedly by the same person. Shocking events.

Holly Lodge estate – where the double murder of an middle-aged couple took place – is the ‘nicest’ type of street you can imagine. Impossible for neighbours and local residents to conceive of this tragedy.

Without going into details, it looks as if it all raises a whole raft of issues about mental health care. The Metropolitan Policy Authority (MPA) is to conduct a study in this area this year – not a moment too soon.