Travellers arriving in the United Kingdom from 8 June will have to tell the authorities where they will be staying and face spot checks to ensure they quarantine themselves for fourteen days, the home secretary, Priti Patel, has confirmed.
While the Home Office said it had been working closely with partners ahead of announcing the changes, the move has been criticised by the travel industry.
"When people say that we're doing nothing, or I'm doing nothing, they are absolutely wrong and don't know what they're talking about", she said.
"As we are taking this action, we are taking at the time when it will be most effective".
All global arrivals, including returning Britons, will have to self-isolate for 14 days and provide details of where they will be staying under the plans, which were criticised by airlines, business groups and politicians alike.
The UK government is set to unveil tough new procedures later on Friday for worldwide travellers coming into the country as the coronavirus pandemic lockdown is gradually eased, including 14-day mandatory quarantines and possible fines for a breach. They will be subject to review every three weeks, to ensure they are in line with the latest scientific evidence and remain effective and necessary.
Spain and Italy have introduced rules that mean worldwide arrivals must self-isolate for two weeks, while on Friday Ireland gave further details for its own quarantine proposals.
Priti said those who breached the quarantine in England could be fined 1,000 pounds ($1,218), and that spot checks would be carried out by health and border officials.
The government argues that it simply wouldn't have made enough of a difference while the virus was spreading widely within the UK. Those in self-isolation will not be permitted to have visitors and should not go out to buy essentials if they are able to rely on others to do so for them.
The rules include Britons arriving back in the country from holiday, putting many peoples' future holidays in jeopardy.
The Home Office has published a full list of exemptions to the new requirements.
"However, given the high levels of compliance we have seen to date, we expect that the majority of people will do the right thing and abide by these measures".
The quarantine will not apply to those arriving from the Irish Republic, or to freight drivers, medical professionals and seasonal agricultural workers.
"We are introducing these new measures now to keep the transmission rate down and prevent a devastating second wave".
Labour's shadow home secretary Nick Thomas-Symonds said the party supported the new measures "but is clear they are no substitute for a long-term, well thought through approach".
"With far fewer people being infected in this country, any new arrivals will have a much bigger impact, potentially causing a second wave".