Many of these will have a BA flight number but , for example, are operated by Aer Lingus, American Airlines, Iberia, Qantas and others.

BA says that none of these flights will be affected and a list of these are posted on the British Airways web site.

All Other flights are subject to disruption, apart from BA flights from London City airport and international flights with a destination outside Europe flying from Gatwick which will operate normally.

For internal and European flights form Gatwick, BA is intending to go out into the market and specially charter aircraft from other operators so that some of the flights will be able to operate normally.

Inflight service may be limited, however, and BA says that these flights may provide a "different style of onboard service".

Flights from Heathrow - the most important hub for BA- will be affected. Some flights will operate using BA aircraft but others will be cancelled.