 In an August 2007 interview, Matthew Vaughn (qv) elaborated on his  reasons for leaving the production. Vaughn cited a huge amount of  studio pressure to finish the film in a very short amount of time, a  script he felt was flawed and a large amount of studio interference.  Determined to make a film on par with _X2 (2003)_ (qv), which he  realized he could not do under the circumstances, Vaughn opted to  leave the production after only a few weeks time. Though he was only  with the production for a short time, the director notes that  several scenes he developed for the script, as well as the casting  of Kelsey Grammer (qv) and Vinnie Jones (qv), were all decisions  he made during his tenure 