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

Headed by payment and P2P lending startups such as Azimo , Transferwise , CurrencyCloud and Funding Circle, fintech firms accounted for 40% of the venture investments in London firms, for a total of $472 million.

Answer: headquarters_location