The UK Government has said Nigeria will be added to the countries on its red list.
This is due to the discovery of COVID-19 Omicron cases linked to Nigeria.
The decision was announced in a tweet by the UK on Saturday.
According to the new protocol, non-UK and non-Irish citizens who are travelling in from Nigeria will not be allowed entry into the UK.
Although the ban is described as temporary, the UK said the new protocol does not apply to persons “staying airside and only transiting through”.