Many of the present day TV Sitcoms are designed for a family audience. Check the schedules to find out when TV Sitcoms are broadcast as this is a good indication of the intended audience. It is important that you realise that the satellite and cable channels are not the original home of the sitcom and shows broadcast here are usually repeats of the original show.
Digital broadcasting has meant declining audiences for all channels, including TV sitcoms because of the range of channels available. Teenage audiences seem happier to aspire to the glitz and glamour of the American dream rather than the more down to earth British variety. Age also defines preferences: the oldies are catered for with the grumpy old men and women in One Foot in the Grave and Waiting for God; families have the evergreen My Family while younger audiences prefer Two Pints of Lager and a Packet of Crisps. You should investigate the scheduling and audiences for a range of past and present TV Sitcoms.