Everyone arriving in the UK from abroad must now self-isolate as the government order shutting all travel corridors comes into effect.
The tighter restrictions, intended to protect against the spread of coronavirus variants, were announced last week by Boris Johnson.
Travellers must also show proof of a negative COVID test taken in the three days before the start of their journey or face a potential £500 fine.
On arrival, they must isolate for 10 days – but can take another test after five days to end quarantine early.
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PM closes all travel corridors
The new rules will be backed by more spot checks to ensure people are remaining in isolation, but it’s still permitted to use public transport to get from an airport to home.
The isolation period also applies to UK nationals returning home, but travel from Ireland is exempt.
People arriving from many countries with low i