I'm not an expert, more a simple listener, to british improv, but I think that album on ECM is really great.
In the vast ECM catalogue there are really some great gems, but ECM won't reissue them!
for example:
Wolfgang Dauner - Output
Bennie Maupin - The Jewel In The Lotus
Julian Priester Pepo Mtoto - Love, Love
and the aforementioned The Music Inprovisation Company - The Music Inprovisation Company, reissued in cd only in japan
at least they reissued the ECM 1016 Terje Rypdal in cd, incredible album, like Miles Davis Jack Johnson meet the first album of Ash Ra Tempel....