Updated: 21 May 2021, 16:07 HEATHROW will separate out travellers from red list countries like India after chaotic scenes in which they were made to mix in long queues with arrivals from safer destinations. Britain's biggest airport has announced it'll reopen Terminal 3 from the start of next month and use it exclusively to process those people coming from the most high risk places. �� 7 The decision to close terminals at Heathrow and Gatwick airports in London has caused a bottleneck. Pictured: Travellers at Heathrow today Bosses say they'll then switch the facility to Terminal 4 "as soon as operationally possible" but have warned the changes are going to be "logistically very challenging".