I went to trad jazz dances regularly when I was in my late teens and early 20s. Therefore, I was keen to hear the three bands. Chris Barber's band of 10 players including 3 saxophonists, who also played the clarinet when appropriate, really created a big band sound rather than a trad jazz sound. Also, he seemed keen to show off his players with solos for long periods. He was neither big band or trad jazz.
Acker Bilk lost the plot altogether. He has a trad jazz set up but he also seemed keener to show off his musicians as individuals rather than as integrated into the band. For me he only managed to get the trad jazz sound when the band played 'Stars and Stripes'. The essence of trad jazz that I knew and loved was as music to dance to and where the band members mostly played solos for short periods and the players were integrated into the music. Unlike other jazz we tended to applaud at the end of numbers and then show our appreciation of any soloists. In essence I feel that in trad jazz the band sound and playing together is the most important thing. He did tell some good jokes.
Kenny Ball who, when I was younger, I thought played more mainstream jazz than the other two Bs, produced a genuine trad jaz sound and his players played solos that seemed to be integrated into the pieces he played. He managed to provide the band trad jazz sound as well as show the excellent quality of his players. However, none of the bands played some of the really great stomp or rag music that I used to like so much. I have an excellent National Trust Jazz CD with them all playing good trad jazz to some classic numbers. What a shame little of this came across at the concert.
I enjoyed going to the concert to see the great band leaders but I was very disappointed with the programme of music and felt that only Kenny Ball captured the trad jazz approach and the sound. I went expecting to be inspired and to buy a CD. In the event neither happened.