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

LONDON (ShareCast) - (ShareCast News) - Tullow Oil (LSE: TLW.L - news ) was under pressure after saying gas exports from the Jubilee Field to the Ghana Gas plant at Atuabo have been suspended since 3 July due to technical issues and is expected to resume mid-August.

Answer: headquarters_location