I believe that Wally Fawkes aka Trog is still with us. I don't recall him ever leading a band but he was a mainstay of Humphrey Lyttelton's early bands and played great clarinet. Also used to play regular Sunday lunch time sessions at the Merlin's Cave in London.

Having done some work with Chris - some PR and road manager for a short Scottish trip the band did North of the border. I happened to be in our Scottish office at the time. On another occasion I put the band on in Arran when I was running a season there.
I am pretty certain that Chris's version of the split with Ken is correct, that the band which he formed for Colyer's return to England was a co-operative. Ken wasn't happy with the style said he was going to sack one of them. However as the band was a co-operative they sacked him.
In my own opinion replacing Ken with Pat Halcox was one of the most important and beneficial decisions Chris and the band made. A great asset.