The current Government advice on Coronavirus is as follows:
There are no coronavirus (COVID-19) restrictions in the UK.
If you have COVID-19 you should try to stay at home.
Most people cannot get free COVID-19 tests. You can buy tests in shops but you cannot report the result to the NHS.
Country specific advice can be found at:
https://www.gov.uk/coronavirus
https://www.gov.scot/coronavirus-covid-19/