The UK has added France, the Netherlands, Monaco, Malta, Turks & Caicos and Aruba to its travel quarantine list.
Brits returning from these countries must self-isolate for 14 days on arrival back in the UK.
The measure will come into force at 4am on Saturday morning, Transport Secretary Grant Shapps said.
"This evening we're announcing that there will now be a quarantine brought in for a number of other locations including France, Holland and some others," he said.
"That's because we've absolutely worked so hard to ensure that we're keeping our numbers down here, and we can't afford to reimport those cases from elsewhere."
"We've got to a point with France in particular, and these other countries, where if we didn't announce it now, we would know that the infection rate was already too high and we were not doing anything about it.
"So we're announcing it now and it will be operational throughout the United Kingdom from 4am on Saturday morning."
Brits currently in France or any of the other countries added to the quarantine list have just over 24 hours to make it back to the UK, or else face a mandatory two weeks of self-isolation.
The news comes hours after the Prime Minister signalled he would take a tough stance when it comes to deciding which countries will have travel restrictions imposed by the UK.
Boris Johnson declared "ruthlessness" will be necessary to defeat the coronavirus threat, and warned travellers to brace for restrictions in terms of returning from visits to France where coronavirus cases have spiked.
France has reported 2,524 new cases in 24 hours, the highest daily rise since its lockdown was lifted in May.
"We have got to be absolutely ruthless about this, even with our closest and dearest friends and partners," Johnson said today.
"I think everybody understands that. We will be looking at the data a bit later on this afternoon, looking exactly where France and other countries are getting to.
"We can't be remotely complacent about our own situation."
Spain and Belgium are among the countries already included on the UK's mandatory quarantine travel list.