A clue to BA's lingering love affair with the 747 lies in the model's ability to eke out capacity from scarce operating slots at its London Heathrow hub at a time when lower fuel prices make retaining older planes an option.
Take context from the input text and decide on the accurate relationship between 'Heathrow hub' and 'London' from the options provided.
Options: distributed by, headquarters location, founded by, publisher