The chairmen of FTSE 100 engineering giant Babcock International (LSE: BAB.L - news ) , British Land (LSE: BLND.L - news ) and the AA have put their names to an open letter from Heathrow chairman Sir Nigel Rudd urging ministers to support expansion of the west London airport.
Refer to the input text as context and select the correct relationship between 'British Land' and 'London' from the available options.
Options: chief executive officer, headquarters location, platform, operator