Quinn Emanuel Urquhart & Sullivan’s London office has seen revenues almost double over the last year, as the US firm’s burgeoning City base continues its rapid growth since its 2008 launch.

The US firm took in London revenues of approximately £21.8m during the 2011 calendar year, up 75% on the 2010 figure of £12.4m reported in the firm’s UK limited liability partnership accounts filed towards the end of last year.