Young woman wearing a face mask with the words "stayin' alert" on itImage copyright
PA Media

The risk posed in England by coronavirus is measured by a five-level, colour-coded alert system.

What is it for?

Prime Minister Boris Johnson has said it helps the government decide how tough social-distancing measures should be:

  • Level five (red) – a “material risk of healthcare services being overwhelmed” – extremely strict social distancing
  • Level four – a high or rising level of transmission – enforced social distancing
  • Level three – the virus is in general circulation – social distancing relaxed
  • Level two – the number of cases and transmission are low – minimal social distancing
  • Level one (green) – Covid-19 is no longer present in the UK – no social distancing

What determines the level?

  • Covid-19’s reproduction (R) number, a scientific measure of how fast the virus is spreading
  • The number of confirmed coronavirus cases at any one time

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In time, the government hopes, the level will reflect the threat in specific areas of England and be used to determine local restrictions.

What is the current level?

England’s Chief Medical Officer, Prof Chris Whitty, said in the middle of May after the alert system was brought in that the UK’s position was best described as level four – meaning the virus was still being transmitted widely and many social-distancing measures would not be relaxed.

Foreign Secretary Dominic Raab says the country is currently in the process of “transitioning” to level three.

Speaking to the BBC’s Andrew Marr show, he said the government had “taken evidence from scientists” and had met the five tests it said were needed to relax restrictions.

Who sets the level?

A Joint Biosecurity Centre (JBC) is now up and running, according to the government.

Set up on similar lines to the Joint Terrorism Analysis Centre (JTAC), it will identify changes in infection rates across England using testing, environmental and workplace data.

The JBC has an “insight team” which will monitor local spikes of Covid-19 and advise health officials and local authorities.

But the government says ministers will make the final decision on any easing or tightening of restrictions.

What about the other UK nations?

The government says it will engage with the devolved administrations in Edinburgh, Cardiff and Belfast, as they develop their own versions – and explore how the JBC can operate as part of a broader infrastructure to address all the UK’s biosecurity threats.

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