Here is a list of countries and territories from where you can travel to England and may not have to self-isolate.

Business Travel News suggests that you save the full link into another file.  It is changed from time to time by the Department for Transport and is current.   The Foreign and Commonwealth Office (FCO) continues to advise against non-essential international travel, except to countries and territories exempt from advice against ‘all but essential’ international travel.

www.gov.uk/guidance/coronavirus-covid-19-travel-corridors

www.gov.uk/guidance/coronavirus-covid-19-countries-and-territories-exempt-from-advice-against-all-but-essential-international-travel