Chelmsford 123

Chelmsford 123 was a spoof sitcom that took place in the Roman occupied village of Chelmsford in the year 123 AD. It featured Jimmy Mulville (G.B.H., but best known as a producer of such programs as Outnumbered), Rory McGrath, Neil Pearson (Drop The Dead Donkey, The State Within, All The Small Things), Philip Pope (bit parts in a lot of programs but best known as a composer TV soundtracks), Howard Lee Lewis (Brush Strokes).
http://en.wikipedia.org/wiki/Chelmsford_123