One of the best TV sitcoms of the past two decades makes for a joyfully oddball audio experience

• The Radio 4 series What’s Funny About… takes a nostalgic look under the bonnet of successful bygone comedies to work out what made them tick. Last year, in the third series, it was the turn of Green Wing. Victoria Pile, who created it, and Tamsin Greig, one of its many stars, recalled making the remarkably weird hospital-based cult hit that popped up on Channel 4 two decades ago.