The prime minister will make a speech about the changes to the House of Commons before addressing the nation this evening.
Under the new plans, areas of England are expected to be categorised as medium, high or very high risk, which will inform the level of intervention required.
The new COVID-19 restrictions are expected to hit areas of the North of England, where infection rates are high, particularly hard.
Under the new measures, tier one areas would continue with ongoing restrictions such as the “rule of six” and the 10pm curfew on pubs, bars and restaurants.
Tier two could mean a ban on households mixing indoors, while tier three is expected to result in the closure of pubs, bars, casinos and gyms, as well as a ban on non-essential travel.