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:
54 REED (Henry). Returning of Issue.The catalogue also includes Cleverdon's personal, inscribed copy of Reed's poems, A Map of Verona.
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.