After making his move to television, Roche joined the writing team for Armando Iannucci's Gash, a satirical TV comedy for Channel 4.
Roche wrote for all four series of the programme, as well as its spin-off film In the Loop, which was nominated for the 2010 Academy Award for Best Writing (Adapted Screenplay).
[5] In 2011 Roche wrote Holy Flying Circus, a fictionalised account of the controversy surrounding the 1979 release of Monty Python's Life of Brian broadcast on BBC Four.
[5] Roche's script centred on the imagined build-up to the appearance of Michael Palin and John Cleese on BBC chat show Friday Night, Saturday Morning to defend Life of Brian.
Roche's re-imagining of the event received criticism for its inaccuracies, including from former Python John Cleese who was cited to have seen the script and commented that he was "disappointed by its content" because it was "not a fair reflection of the facts".