I think you'll have to ask the BBC (Contact Information); The Land of Green Ginger written by Alan Plater, was a TV play first broadcast in 1973. It was shown again on Sat 26 March 2005 as part of a tribute night for Alan Plater, but the details have already vanished from the BBC website. The play doesn't appear to be in print , nor is it available from the BBC shop. Good luck!