After several knockbacks and rejection letters more or less saying the same thing I decided to conduct an experiment.
I chose a sitcom from 2006 that had been commissioned and produced by the BBC but only lasted one series I then copied episode 1 and wrote a script practically word for word including 'actions', the only thing I did was change the characters names and name of the show.
I sent the script to the production company who produced the original series and was told by them that the script was not something they would look to invest in as the characters were one dimensional and the plot didn't seem strong enough to sustain a series.
What do you have to do to get a commission...