Airlines around the world have had to park up their planes

Aviation is the most global of global industries. It employs millions of people, underpins the livelihoods of tens of millions more, and acts as part of the central nervous system of international business and leisure.

Yet now vast parts of the network have been shut down. The number of daily flights has fallen by 80% since the start of the year, and in some regions nearly all passenger traffic has been suspended.

The industry is in survival mode, with airlines, airports and ground-handling firms all desperate to conserve their cash reserves, while their normal revenue streams have dried up.

Widespread job losses are now expected, with British Airways’ parent company IAG announcing on Tuesday that it is set