Britain will require passengers arriving from countries where worrying coronavirus variants are spreading to pay for 10 days of quarantine in hotels, while rule-breakers will face heavy fines or jail terms, under tighter restrictions from next week, according to Reuters.

The new travel rules add to restrictions that already ban travel abroad for holidays. The government said the stronger measures were needed to prevent new variants of the virus from thwarting Britain’s rapid vaccination programme.

Airlines and travel companies called for more government aid, saying the new rules would deepen a crisis that has seen them lose nearly all their revenue.

Health secretary Matt Hancock said people could be sent to prison and fined up to 10,000 pounds ($14,000) if they break the rules which come into force on Feb. 15.