This beefed-up tier system will last until the spring, with the level of restrictions in each area reviewed every two weeks.
In a change to rules before England’s second lockdown, ministers have said that decisions on tiers will be primarily based on five key indicators.
Case detection rates in all age groups
Case detection rates in the over-60s
The rate at which cases are rising or falling
Positivity rate (the number of positive cases detected as a percentage of tests taken)
Pressure on the NHS, including current and projected occupancy
The government is expected to announce on Thursday which areas will be placed into each tier of restrictions.
But analysis of data already available could point to the regions set to go into the strictest rules next week. Here’s what we found.
Number of new coronavirus cases in each region
In the week leading up to November 22, West Yorkshire, the West Midlands and Staffordshire topped the table of areas with the highest rates of coronavirus.
Areas with the highest case rates in the week to 22 November:
Out of the top 12, only Greater Manchester and South Yorkshire had been in tier 3 before the national lockdown.
How are the number of cases changing in each area?
It’s not just the number of cases in each area that will be important when ministers decide levels of restrictions – whether this figure is on the increase or decrease will also be key.
Want to know if the relative number of coronavirus cases in your area are rising or falling? Use the searchable table to find out what’s happening in your local authority.
In the areas with the highest rates of infection, the number of cases is on the decline
Despite having the highest infection rates in the country, all of the regions in the top 12 saw a decline in the infection rate compared to the previous week.
The R rate
Ministers have said that the R rate – otherwise known as the reproduction rate – of the virus will also play a key part in determining the level of restrictions in each area.
Generally, if the R rate is above 1, it means that the epidemic is growing. For example, an R rate of 1.4 would mean that every 10 people with the virus would go on to infect 14 more people.
However, if the R rate is less than 1, the epidemic is shrinking.
Data analysis revealed that the south-east of England had the highest R rate in the country, as of November 20, with a reproduction rate of between 1.1 and 1.3.
Number of coronavirus cases in the over-60s
Another of the five factors ministers will consider when deciding the level of restrictions in each area is the number of Covid-19 cases in people over the age of 60, who are at an elevated risk from the virus.
The table shows the total number of people tested from November 5 to November 11, the latest available data.
According to the latest government data, the national rate of over-60s testing positive was 2%.
The searchable table allows you to find the number of people over 60 testing positive for Covid-19 in all areas that were above the national average of 2%.
This article originally appeared on HuffPost UK and has been updated.