Take context from the input text and decide on the accurate relationship between 'Tullow Oil' and 'LONDON' from the options provided.
Options: parent organization, headquarters location, subsidiary, publisher

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.
headquarters location