Utilize the input text as a context reference, choose the right relationship between 'Inmarsat' and 'London' from the options.
Options: distributed by, location of formation, legal form, headquarters location

Inmarsat (LSE: ISAT.L - news ) ’s shares were rocketing in London alongside the launch of its third Global Xpress satellite, which went into orbit yesterday to help complete the firm’s next-generation broadband internet network.
headquarters location