People in Gedling borough who test positive for coronavirus or show symptoms in the UK must now self-isolate for at least 10 days, rather than seven.
The change, announced by the UK’s chief medical officers, is part of plans to help avoid a resurgence of the virus.
Those showing key symptoms – a new continuous cough, a temperature or loss of taste or smell – had previously been told to isolate for seven days.
The new advice is in line with World Health Organization guidance.
The chief medical officers said the change is “particularly important to protect those who have been shielding and in advance of the autumn and winter when we may see increased community transmission”.