Anyway, I found this BBC press pack which is rather good. The character profiles are especially caustic, although we wouldn't expect anything less from Armando Iannucci. Those of us who work in the civil service will recognise this quite clearly:
"The Department of Social Affairs came out of the Prime Minister's passing enthusiasm for 'joined-up government.' It is a 'Super Department', overseeing many others - and with some specific responsibilities of its own."
The full series should a blinder.