A Negative Covid-19 Test result is now required when entering Scotland and England. This may also be applied to the rest of the UK however it has not yet been announced.
'People arriving by plane, train or boat, including UK nationals, will have to take a test up to 72 hours before leaving the country they are in. Transport Secretary Grant Shapps said travellers "can't board... without having that negative test". But even with a negative test, arrivals from countries not on the travel corridor list must still quarantine.'
Excerpt taken from the BBC article: https://www.bbc.co.uk/news/uk-55582116
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