 Although earlier BBC radio shows such as "Much Binding in the Marsh", "Take It From Here", and "Beyond Our Ken" had conditioned listeners to a mix of music, sketches and jokes in a 30-minute show, and "Round the Horne" was also doing this, "ISIRTA" accelerated the transitions, and it certainly seemed more improvised.It was one of those programmes where the listener was unlikely to get all the jokes on first hearing, so would have to listen to the scheduled repeat (or a tape recording) to discover what they had missed.It thus helped prepare the television audience for "At Last the 1948 Show", Spike Milligan's "Q" series, "Monty Python's Flying Circus", and "The Goodies".