Utilize the input text as a context reference, choose the right relationship between Standard Chartered 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.

For example, last week’s agreement signed by Standard Chartered and other banks with the London Metals Exchange reflects the increasing demand for commodities from OBOR projects.

Answer: headquarters_location