All remaining new restrictions for UK arrivals have been withdrawn, including the requirement for Covid-19 testing and passenger locator forms, signaling the complete restoration of inbound travel. According to a posting on its official Twitter feed, Heathrow Airport has verified that the necessity for wearing facial covers or face masks at the airport has been waived as of Wednesday, March 16.
"We still firmly advise both workers and guests to wear masks, especially when they come into close touch with others, but it will no longer be compulsory." the airport explained. Travelers may, however, be expected to wear a face mask or facial covering onboard their journey to the UK, thus passengers should verify the airline's rules before flying.
Virgin Atlantic released a declaration in response to the current announcement, saying:    The mask rules that apply will depend on the route you   re flying because requirements differ by destination.   
Furthermore, beginning on Friday, March 18th, travelers landing in England will not be required to do any Covid-19 tests. This covers both the Covid-19 PCR test performed before flying and the Covid-19 PCR test performed after reaching the UK airport.
From March 18, visitors to the UK will no longer be needed to complete out a UK passenger locating form prior to traveling.
The laws, according to the UK government, will be applicable to everybody, regardless of whether they have been vaccinated or not. Passengers traveling in the UK after March 18 will not be required to undergo quarantine, as per present regulations.
Virgin Atlantic issued a message on Twitter in response to the official news, saying, "This is the final phase towards travel restarting." This Spring, we're looking forward to welcoming many more clients back to the skies."
This move reflects the government's decisions outlined in the Living with COVID strategy, as well as the effectiveness of the UK's vaccination and booster rollout, which has seen 86 percent of the population receive a second dose and 67 percent receive a booster or third dose.
Passengers are also recommended to read the booking restrictions carefully before purchasing tickets to ensure that they have the freedom to change their plans. The NHS COVID Pass will continue to let people view their vaccination and recovery data when traveling abroad.
Link: https://twitter.com/HeathrowAirport/status/1503426668836360202?s=20&t=ykQ39YrkESzv9HkCih7tsg
https://www.gov.uk/government/news/all-covid-19-travel-restrictions-removed-in-the-uk