Utilize the input text as a context reference, choose the right relationship between Costa Coffee and London from the options. Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.

Apple has played its part in that respect, winning support from London Underground and retailers including pharmacy chain Boots, Costa Coffee and supermarket chains Marks and Spencer and Waitrose.

Answer: location_of_formation