It may be two years since lockdown was first launched and almost all restrictions will be dropped in England from April 1, but Covid-19 is still around.
Countries around the world - and within the UK - have their own rules as the pandemic continues. Often these differ from England, where wearing a mask is no-longer compulsory.
All this means that the rules for wearing masks on planes can depend on where the airline is based, as well as where each plane is travelling to and from.
