Brits will need to prove they have an essential reason for travelling abroad from tomorrow - or risk a £200 fine.
Anyone who fails to fill out a form stating the reason for their trip could be blocked from boarding their flight or face a hefty fine, the Department for Transport confirmed.
The three-page form must be downloaded from the Government's website and signed before travel.
Travellers can then present a paper copy or carry the form on their mobile to show airport staff at check in or at the departure gate.
Passengers who do not have a valid form can be denied access to their flight.
The details emerged 40 days after Home Secretary Priti Patel announced a crackdown on people going abroad without a valid reason.
© Getty ImagesHome Secretary Priti Patel first announced the plans in January
Ms Patel announced the clampdown on January 27 in an attempt to prevent influencers and holidaymakers going to "sunny places".
But it emerged that the ban would only be legally enforceable from March 8 last week, with the detail buried in the 68-page lockdown roadmap.
Video: Several coronavirus cases in Welsh Government staff (Daily Post)
Several coronavirus cases in Welsh Government staff
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Foreign travel is currently illegal in England except in a few cases, such as work, volunteering, education, medical grounds and funerals.
Travellers will have to fill out the form with their personal details and give a reason for why they are going abroad.
Police have been stepping up patrols at ports and airports in recent weeks and officers will be doing spot checks from Monday, the Department for Transport said.
Failing to provide a form - or a valid reason for travel - could trigger a £200 fine for breaking stay at home rules.
The maximum fine for breach of the regulations is £6,400.
Brits will not be allowed to go abroad for a holiday until the third phase of Boris Johnson's lockdown roadmap, which will come on May 17 at the earliest.
© REUTERSPeople returning from 'red list' countries must quarantine in hotels for 10 days
All international arrivals are already required to present proof of a negative coronavirus test in the past 72 hours on return.
People returning from countries on the Government's red list must quarantine in hotels for 10 days.
Passengers returning from any other countries can quarantine at home for 10 days, and must take tests on day two and day eight of their isolation period.
The Government has come under fire over delays in implementing strict border policies.
Quarantine-free travel was allowed for nearly a year after the first Covid cases were found in England.
Ms Patel also announced plans for quarantine hotels on January 27 but the measure was only introduced on February 15, by which time thousands of extra people had returned from the 33 "red list" countries - despite the risk of a new variant.