Should I book a holiday for spring? Will vaccine passports open up our holidays? How travel to Europe will change after Brexit New UK testing entry rules: everything you need to know Sign up to the Telegraph Travel newsletter The UK's tough new testing rules came into effect this morning, with all international arrivals now required to show a negative Covid test or face a potential £500 fine. The legislation is intended to protect against the spread of coronavirus variants, after two new forms of the virus were recently discovered in Brazil. A quarantine is also still in place for all UK arrivals, consisting of 10 days – but shortened to five if a second negative test result is obtained. Currently, no one is able to bypass this quarantine due to the removal last week of all the UK’s travel corridors. More spot-checks have also been ordered to check that people are quarantining, and all exemptions to the policy – including the controversial separate rules for business travel – have also been removed. While the travel industry has spent the past year calling for an effective testing regime, many business leaders are still despairing over the continued use of a quarantine. Speaking on Radio 4 this morning, CEO of the Airport Operators Association Karen Dee warned that the new measures will make little difference to the industry currently – because quarantine is the “biggest deterrent” against booking trips, rather than testing. Scroll down for the latest updates.