Tier 4 exceptions which allow people to see loved ones over Christmas

mirror.co.uk:

Millions of families across the UK were forced to scrap Christmas plans this week after yet another government U-turn. Having previously said that people were going to be allowed to form 'Christmas bubbles' for five days from today, panicked Boris Johnson was forced to scrap the plan on Saturday.

He said a new Covid-19 strain, which spreads faster than previous incarnations, meant it was no longer possible to allow households in many parts of the country to mix.

Around 18 million people in the South East were put into a new Tier 4 and told that Christmas bubbles would no longer be permitted at all.

For the rest of England, the five day festive break was cut back to just one day, Christmas Day itself - but families were warned to think