It will become illegal for people in England to leave the UK under new rules coming into force on Monday, the Government has said.
Anyone who breaks the rules will face a £5,000 fine.
The Government says this is designed to stop the spread of Covid - especially new variants.
Under the new laws, non-essential foreign travel will be banned until June 30, unless ministers U-turn at a later date.
A Government taskforce is looking at when foreign travel could resume and it is expected to report to Boris Johnson by April 12.
There are a number of exemptions to the ban, which are travel for:
• Work
• Study
• Legal obligations or to vote
• Moving, selling or renting property
• Childcare reasons or to be present at a birth
• Visiting a dying relative or close friend
• Attending a funeral
• Getting married or attending the wedding of a close relative
• Medical appointments
• Escaping a risk of harm
The rules state no-one may "leave England to travel to a destination outside the United Kingdom, or travel to, or be present at, an embarkation point for the purpose of travelling from there to a destination outside the United Kingdom" without a reasonable excuse.
The travel ban does not apply to visits to the Channel Islands, Isle of Man and the Republic of Ireland.
Brits will still be required to fill in a travel declaration form before leaving the UK, which sets out their reasons for the trip and their personal details.
Failure to do so carries a £200 fine and airlines can block people from boarding their flights if they haven't filled out the form.
