Er enghraifft, yr wythnos diwethaf cofnododd Maes Awyr Heathrow golled o £2 biliwn ar gyfer y flwyddyn, ar ôl i nifer y teithwyr yn ystod pandemig y coronafeirws ostwng i lefelau na welwyd mohonynt ers y 1970au.
For instance, last week Heathrow Airport reported a £2bn annual loss after passenger numbers during the coronavirus pandemic dropped to levels not last seen since the 1970s.