The three-tier system began on 2 December, when England's four-week second national lockdown laws expired.
The MA has mapped out the new system and will update it with further announcements. It was last updated Monday 4 January, following the latest tier review on 30 December.
The latest review saw the closure of all pubs in England with the exception of the Isles of Scilly.
Pubs remain closed in a number of cities in the north of England and closures have also hit areas of south England reporting high coronavirus rates.
Prime Minister Boris Johnson announced an additional fourth tier of measures - which included a ban on Christmas gatherings and a 'stay at home' order - on Saturday 19 December.
Areas in the south of England including Surrey and London faced stricter rules after concerns a mutant strain of coronavirus was accelerating infection rates.
Tier four rules were extended to areas of the east and south of England including Norfolk and Sussex in an announcement by health secretary Matt Hancock on Wednesday 23 December.
Rules were tightened across large parts of England following concern over the new variant of the virus, with nearly all areas under tier three or four measures by 31 December.
Just one area - the Isle of Scilly - is in the most relaxed set of rules, where people must follow the rule of six when socialising and pubs can serve drinks until last orders at 10pm.
Announcing the tougher measures, health secretary Hancock said: "This Christmas and the start of 2021 is going to be tough. The new variant makes everything much harder because it spreads so much faster.
"But we mustn't give up now, we know that we can control this virus, we know we can get through this together, we're going to get through it by suppressing the virus until a vaccine can make us safe."