Greater Manchester mayor says the curfew is doing "more harm than good", but ministers defend it.
But students are assured they will be able to return home for Christmas holidays.
The partner of Sgt Matiu Ratana who was shot in Croydon says he had an "infectious smile and big heart".
National Police Chiefs Council says officers should not install contact-tracing app on work phones.
Criminals are targeting loans designed to help small firms stay afloat in the coronavirus pandemic.