England is a Group B country under Guernsey's pandemic travel system at the moment, but officials have said this could switch to Group A status.
This is due to data from England and comes as the government in the UK has announced thousands more cases of Covid-19 in recent days - the highest figures since May - amid concerns of a second wave of the virus there.
People arriving in Guernsey from a Group B country are eligible for testing on day seven of their self-isolation and can leave their self-isolation if that test is negative, while observing the rules of ‘passive follow-up'.
Travellers who have been in a Group A country in the preceding seven days will be required to self-isolate for 14 days.
In an update online, the States of Guernsey said: 'Italy and Hungary have moved to the Group B watch list. Current data from England means it could shortly go on the Group B watch list, with a possible subsequent move to Group A in the following days.'