If you and Talking Pictures can find out, from whom Dave Clark obtained the Ready Steady Go! episodes?, this may lead to other Rediffusion programmes that include No Hiding Place.
AFAIK William Ready Steady GO episodes were discovered by the Inland Revenue LOL. Apparently, when AR ceased to be, the basement used as the early RSG studio was rented out as storage space for the IR.
It was after some considerable time (perhaps after a cupboard stock check or something) probably somebody in the tax office said "hey what the hell are these?"
Enjoyed No Hiding Place in a quiet sort of way. Typical 60’s procedural I thought. Very pleased to see Talking Pictures confirm before & after the credits that the episode came from a collector & that they stated their commitment to search for other missing TV.