What is the relationship between British Airways 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.

Kevin Leung, Country Commercial Manager at British Airways said, 'We are pleased that Airtel Premier customers now have the advantage of travelling between Accra and London and over 150 destinations at specially discounted rates.

Answer: headquarters_location