The government is set to review the tier systems on December 31, 2020, falling directly on New Year’s Eve. The last review saw all areas waiting to find out if they were going to go up or down just days before Christmas – with most areas waiting on the official announcement released today (Thursday 17 December.)
https://www.examinerlive.co.uk/news/west-yorkshire-news/next-covid-19-tier-review-19479273