Led by British bass virtuoso Arnie Somogyi, Improvokation is a 10-piece, folk/jazz group made up of musicians from the UK and Hungary. Their all-original repertoire is rooted in bouncy post-bop and east European Gypsy tunes. The overall sound is funky and soulful, with an airiness redolent of Wayne Shorter's most recent work. Tunes appear to waft like morning mist, but are actually tethered to a tight harmonic leash and played with consummate control.

The line-up comprises a four-piece horn and wood-wind section, piano, bass and drums, electric guitar, violin and cimbalom. The latter is played by Kalman Balogh, a descendent of a dynasty of Hungarian Gypsy musicians. Other notable members include UK trumpeter Neil Yates, whose mastery of flutes, whistles and the bodhran provides a layer of folksiness.

A tune called Herdeman opens the set, driven by an insistent bass riff from Somogyi. As the band surge around him it brings to mind Coltrane's A Love Supreme. Pianist Bela Szakcsi Lakatos provides some appropriately percussive runs, while imbuing his playing with a Grieg-like rustic lyricism.

It's an eclectic mix that could have been a little bewildering, but thanks in part to Winston Clifford's funky drumming (spookily like Tony Williams in places) it hangs together beautifully.

Somogyi is a genial host, cracking gags at his own expense, introducing his Hungarian band-mates in a deliberately terrible accent and finally unveiling a surprise birthday cake for violinist Beata Salamon. As the band ease into a creaking version of Happy Birthday - which leads into a playfully shambolic improvised section - you find yourself reflecting on what a thoroughly heart-warming evening this has been.