Gheorghe,
Well, if you investigate Collier's music, I hope you enjoy it!
I suppose pianist John Taylor was the most well-known musician on the session. He played with Kenny Wheeler and Norma Winstone in the trio ensemble Azimuth. They recorded several albums for ECM in the 70s and 80s.
Taylor and Winstone were married, and they recorded as a duo as well. Can't help but recommend their album ...Like Song, Like Weather from 1999. It's amazing.
Thanks Jim!
EDIT:
After some poking around on discogs, I discovered that Mighty Mongo was reissued on this CD:
Found it on YT, and I'm listening now.