What is the relationship between British Land 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 (ShareCast) - (ShareCast News) - British Land (LSE: BLND.L - news ) said it has had a good start to the year, with strong occupational demand and lettings well ahead of estimated market rental value.

Answer: headquarters_location