There are now 79 confirmed cases of coronavirus linked to an outbreak in Aberdeen – with more expected in the coming days, the BBC reports.
Lockdown restrictions were rolled out in the Scottish city on Wednesday after cases reached 54.
Since then, First Minister Nicola Sturgeon said an additional 25 cases had been confirmed.
On Thursday evening, Transport Secretary Grant Shapps confirmed that three countries will be removed from the UK travel corridor list.
People arriving into the UK from Belgium, Andorra and The Bahamas will have to self-isolate after a rise in coronavirus cases.
It means anyone arriving into the UK from one of the three countries after 4am on Saturday will have to self-isolate for 14 days.
Meanwhile, a further 950 cases of coronavirus were confirmed in the UK on Thursday – the highest daily number for six weeks.
A total of 49 more deaths have also been confirmed, bringing the UK death toll to 46,413.
The worst affected areas in England remain Blackburn with Darwen, where there are 82.2 cases per 100,000 people. It is followed by Oldham, at 67.9, Pendle, at 58.6, and Leicester, at 52.2 cases.
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Other areas where there have been increases are Swindon, Calderdale, Manchester, Preston and Tameside.
In Leeds, the city council has warned of clusters in Kirkstall and Harehills and says “further steps may need to be considered” if case numbers continue to increase.
In Hull, the infection rate in the seven days to August 3 is 1.9 – with five cases confirmed – compared to 3.5 in the seven days to July 27, when nine cases were confirmed.