Among his credits as a radio producer, Cleverdon was responsible for the adaptation of David Jones's In Parenthesis (1948); Henry Reed's Italia prize-winning drama, Return to Naples (1950); Dylan Thomas's Under Milk Wood (1954); as well as all the plays in Reed's seven-part Hilda Tablet sequence (1953-1959). All in all, Cleverdon produced over two hundred programs for the BBC.
There's a fine article by Alex Hamilton on Cleverdon's achievements, "The Third Man," in The Guardian from November 20, 1971, which accompanied a profile on Henry Reed for the publication of the Hilda plays.
The Maggs Bros. catalogue, which is from 2010, includes this item:
The catalogue also includes Cleverdon's personal, inscribed copy of Reed's poems, A Map of Verona.54 REED (Henry). Returning of Issue.
Original heavily corrected manuscript and heavily corrected typescript of the fifth and final poem in Henry Reed’s The Complete Lessons of the War series, inscribed by Reed: "To Douglas & Nest Cleverdon with love and gratitude Henry Reed, July 29, 1965". With a note from Henry Reed confirming Cleverdon’s ownership of the manuscript and a note from the BBC allowing this gift from Reed to Cleverdon. £4000
Together with 23 TLS and ALS from Reed, predominantly to Douglas but with a couple to Nest and one to their elder son Lewis. Mostly in the mid 1960s and about radio drama and poetry by Henry Reed and the BBC but with 7 from 1950-51, also about Reed’s radio work. One is in the character of the spinster "Emma Titt-Robbins", Tablet was the protagonist of Reed’s satire The Private Life of Hilda Tablet, broadcast in 1954.
I don't know if anyone snapped up the Reed manuscripts and letters back in 2010, but if I had £4000 pocket change, I would donate them to the University of Birmingham's Special Collections, to go with rest of Reed's papers and manuscripts.