A £5,000 fine for anyone in England trying to travel abroad without good reason is due to come into force next week as part of new coronavirus laws.
The penalty is included in legislation that will be voted on by MPs on Thursday.
Foreign holidays are currently not allowed under the “stay at home” rule which ends on Monday.
But then the ban on leaving the UK at this time will become a specific law backed up by the threat of the fine.
Under the current plan for easing restrictions, the earliest date people in England could go abroad for a holiday would be 17 May.
However, another surge in Covid cases in continental Europe, as well as the slow rollout of vaccines across Europe, has cast doubt on the resumption of foreign travel.
Health Secretary Matt Hancock said restrictions on travelling abroad were necessary to guard against the importation of large numbers of cases and new variants which might put the vaccine rollout at risk.
Prime Minister Boris Johnson warned on Monday the UK should be “under no illusion” that it will feel the effects of a rising number of cases on the continent.
Anyone travelling abroad has to fill in a “Declaration to Travel” form, stating a valid reason for leaving the country, such as education, work or childcare.
England’s travel ban does not apply to those going to or from the common travel area of the Channel Islands, Isle of Man and the Republic of Ireland unless that is not the final destination.