Continuity mistake: In Season 1, Episode 5, we see the MI5 agents report Sam and Phil's identities to the Director. With the ID cards on screen, they state Sam as being 29, with a date of birth 25/03/1983. The series was released in 2013, so this age fits with the show's production dates of late-2012 or early-2013. However, Phil's age is described as 31 (but DOB is visible as 11/09/1985 - which would make him 26 or 27). Phil's age is detailed as 31 elsewhere in the series.
xx:xx:xxDavid R Turner