Latest statistics also show, for the second year in a row, more over-16s vape than smoke.

Infrared technology is used in patients' bedrooms and can monitor their breathing and pulse.

Early recommendations could be issued if evidence highlights patient safety risks, the chair says.

Hugo Flint-Cahan, 34, was fatally attacked by Rolando Torres-Pena, 22, at a mental health trust in east London.