I haven't listened to this myself, so I post it here with no knowledge of whether the advice is sound or not. Let me know in ten years time when you have a hit BBC1 sit-com
http://writersguild.libsyn.com/writing-comedy-for-tv
And while we're on the subject you might want to dust down that brilliant play you wrote
Best New Comedy Play award 2011
For the first time in 2011 writers are being asked to submit scripts for the National Comedy Theatre New Comedy Play of the Year Award. Scripts of full-length comedy plays written for the stage should be sent in PDF to ncnationalcomedytheatre@gmail.com together with a synopsis and the writer's CV by March 1st 2011. The winning play will be produced in a London theatre in 2012.
http://www.nationalcomedytheatre.co.uk
