Each tier will involve increasingly stricter restrictions with the system designed to tackle the virus on a regional level.
The deputy chief medical officer said the country is "running into a headwind" as winter approaches and that as COVID-19 cases rise, "increases in deaths will now follow".
"As Saudi Arabia is to oil, the UK is to wind – a place of almost limitless resource," said UK PM Boris Johnson, outlining plans for a post-COVID green recovery.
US President Donald Trump joined a growing list of leaders who have tested positive for COVID-19.
Boris Johnson said he would not hesitate to issue stricter measures while France's prime minister is set to meet with local mayors to discuss the deteriorating COVID-19 situation.
The British government has made a huge commitment to safeguard nature.
New restrictive measures were imposed in the UK on Tuesday. The opposition now want the government to extend the furlough scheme due to phase out in October.
The EU threatened legal action if parts of the contentious bill, which a UK government minister admitted broke international law, were not removed.
As he faced a grilling from British lawmakers at PMQs, Prime Minister Boris Johnson said the UK was carrying out more COVID-19 tests than any other European country per 1,000 of the population.
"This way of negotiating, with reason cast aside in pursuit of ideology and cavalier bombast posing as serious diplomacy, is irresponsible, wrong in principle and dangerous in practice," the former UK leaders said.
UK prime minister says he will press ahead with proposed law that a minister admitted breaks international law