Under current guidance, anyone arriving from overseas will be asked to provide an address for where they plan to self-isolate for the two week period, and could face fines of up to £1,000 if they fail to follow the rule.
Authorities are said to have the power to check up on Britons at any time.
However, along with being slammed by travel industry insiders for its potentially detrimental effects on the industry, Mr Lewis and his team of financial pros have also suggested it could result in financial losses for would-be holidaymakers.
The financial team say they have been contacted by Britons who are worried about this possibility and whether they would be entitled to a refund.
“We’ve been asked by several users if they’ll be able to legally get a refund on travel abroad (for example, a flight or package holiday) if they were unable or unwilling to quarantine for two weeks on their return, and therefore were unable to take the trip,” explains the MSE website.