My favourite Michael Garrick record, Cold Mountain, happens to be a trio. The LP is very rare, although CD transfer from about 2000 years ago excellent.
An overlooked gem from the late 60s/early 70s British free jazz scene is Flight by Howard Riley, with Tony Oxley and the formidable Barry Guy.
On a more contemporary note Kit Downes is doing some interesting things. (I’m biased as he’s related to my wife). I hear John Taylor, Michael Garrick and Paul Bley in his compositions and playing style (in fact one his tunes is called Bleylines), but most importantly he has his own voice and ideas. And he’s now recording for ECM, I’m looking forward to what he does there.