As it happened: Matt Hancock says 'no doubt virus is accelerating' - BBC News
The health secretary outlines a new plan to prioritise tests after problems with the UK system.
The move to level 4 should not come as a surprise given the warning from the UK's two most senior pandemic advisers this morning.

Infections are rising - although some experts question whether the situation is as dire as Prof Chris Whitty and Sir Patrick Vallance set out when they raised the prospect of 50,000 cases a day by mid-October.

Cases were always expected to increase at this time of year when respiratory viruses tend to circulate more coupled with the continued re-opening of society.

Certainly the trajectory of countries like France and Spain is not as sharp as the worst-case scenario put forward.

But it is clear the government wants to act early this time - one of the big criticisms is that they were slow to introduce lockdown in March, which resulted in more deaths.

Level 4 paves the way for extra restrictions to be introduced with an announcement expected on Tuesday.

Officials are very aware a fine balance needs to be navigated, which is why a full lockdown is not on the cards.

Schools will certainly be protected.

But any restrictions have a cost to society. Go too far and the risk is the cure becomes worse than the disease.