What is the relationship between Costa Coffee and LONDON in the context of the input sentence. Choose an answer from: 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.

LONDON (Reuters) - Whitbread (WTB.L), one of Britain's biggest employers, plans cost savings and will raise some of its prices to counter the substantial impact of enforced wage increases at its Premier Inn hotels and Costa Coffee businesses.

Answer: location_of_formation