Utilize the input text as a context reference, choose the right relationship between Dixons Carphone 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) - Decent gains from blue chips BP and Dixons Carphone (LSE: DC.L - news ) helped UK markets to rise on Thursday, bucking the negative trend seen across Europe as investors started to trim positions ahead of a pivotal weekend for Greece.

Answer: headquarters_location