With a single track of just 26 minutes, it’s debatable whether this constitutes a full album. But what it lacks in duration it makes up for in incident. Recorded live in front of what sounds like a small but appreciative audience, it captures two veteran improvisers having a whale of a time.

The performance sits very firmly in the free improv tradition – which is another way of saying that nothing particularly original happens. The late John Russell played acoustic guitar with a very strong stylistic debt to Derek Bailey, under whom he studied early in his career.

So, that means brittle strumming, wide intervallic leaps and chilly harmonics. Belgian vocal improviser Jean-Michel Van Schouwburg is fluent in the kind of hyper-expressive vocalese pioneered by Phil Minton and has even mastered Minton’s most impressive and idiosyncratic technique, the multiphonic split-note cry.

Still, when the two of them get going, it’s a lot of fun, with Russell scrabbling around intensely and Van Schouwburg grumbling and burbling like the soundtrack to an avant-garde Czech cartoon from the 1960s. Yes, it sounds kind of silly but, as another chance to hear the much-missed Russell who died in 2021, it’s also rather moving.