The UK's largest airport joins British Airways and Virgin Atlantic in easing mask-wearing rules.
Virgin Atlantic said it was also changing its face mask policy from Wednesday, making it a personal choice for customers and crew to wear them on board.For now, that means flights between Heathrow and Manchester and destinations in the Caribbean such as Barbados, St Lucia and Antigua.
It highlighted that on routes to or from the US, masks would still be required until at least 18 April. From Wednesday, British Airways customers will only have to wear a face covering on board flights if the destination they're travelling to requires it. Earlier this month, the airline and tour operator Jet2 relaxed its rules on face coverings for flights to and from England and Northern Ireland. Since Friday, Tui has done the same.