International travellers, including returning Brits, could face police spot checks and £1,000 fines if they fail to self-isolate on arriving in the UK.

Those coming into the country must provide an accommodation address where they will quarantine for 14 days under the measures to guard against a second wave of coronavirus.

Home Secretary Priti Patel is expected to outline the plans – which will be introduced early next month – at the daily Downing Street briefing later today, a senior Government official confirmed.

Border Force, police and Public Health England officers will run and enforce the quarantine measures, with 100 checks per day expected.

Exemptions for road haulers and medical officials will apply, while the common travel area with Ireland will be unaffected.

Arrivals from France will not be exempt, the official confirmed, following confusion earlier this week.

Travellers will be asked to fill in a form with their contact information, and health officials will perform spot checks to ensure compliance with the measures.

Police officers are set to be given powers to check new arrivals are quarantining – Image: Getty Images/iStockphoto

The move will anger some sectors, with Ryanair boss Michael O’Leary earlier this week branding the plan “idiotic” and “unimplementable”, while trade body Airlines UK has previously said a quarantine “would effectively kill” international travel to and from Britain.

The regulations are expected to be introduced under the Health Protection Act, but will not come into force before June – while it remains unclear if MPs will vote on the matter.

Former Tory leader Sir Iain Duncan Smith is amongst those opposed to the measures, reports the Daily Telegraph.

this quickly and not go into quarantine. If they got their testing level up, then anyone coming in would be tested and put on the tracking app.”

While Steve Baker, the Conservative MP and former chairman of the European Research Group of Tory MPs, told newspaper this week he is baffled as to why the idea of quarantine has suddenly surfaced. 

He said: “We should be taking every possible measure to open up society and the economy and get things going, otherwise the economic and clinical cost is going to be far too high.

“What we have learnt about the virus means we can shield the vulnerable and respect people’s individual choices to behave appropriately so we can open up society as quickly as possible.”