Which "The A–Z of Mrs P" actress was also on a sitcom that aired on Channel 4?
The A–Z of Mrs P: The A–Z of Mrs P is a musical conceived by Neil Marcus and written by British playwright Diane Samuels and British composer Gwyneth Herbert. Peep Show (TV series):  It was broadcast on Channel 4 from 2003 until 2015.
i don't know