Official Secrets Act (OSA) was a pop-rock band from London, England.
Thomas Burke, Alexander Mackenzie, and Lawrence Diamond formed a band at Leeds University after bonding over an interest in British military history.
Michael Evans joined after catching one of their early gigs.
[1][2] The band has drawn inspiration from both British and American guitar-based bands, such as Talking Heads, Futureheads and Blur.
[3] OSA was the first band to perform in Black Cab Sessions's the Secret Garden Party Sessions in July 2009.