The amount of office space being built in central London rose by 24 per cent in the six months to the end of March, a survey of construction activity by advisory firm Deloitte found earlier this year — the second-biggest increase in 20 years.
Refer to the input text as context and select the correct relationship between 'Deloitte' and 'London' from the available options.
Options: owned by, headquarters location, position held, distributed by