When collaborative improvisation is operating at the highest levels, it's not so much a case of the participants reacting to each other, more that they act as one – guiding the flow of events with a conjoined intelligence capable of making spontaneous decisions utterly in tune with the moment. It takes a special kind of close listening to make this possible, a skill honed through years of practice. Evan Parker may have a few decades head start, but he's found a worthy partner in pianist Alexander Hawkins. Recorded live in Leicester (hence the fabulous title pun), these four long-ish extemporisations – the longest clocking in at around 35 minutes – display incredible feats of instantaneous telepathic interplay, suggesting the fluid liquidity and natural logic of water in its various forms. Tiny ripples grow into lapping waves punctuated by sudden crests, building to fiercely turbulent eddies before subsiding to gentle swirls. Throughout, Parker's gruff tenor tone is complemented by Hawkins’ more mellifluous excursions, creating a series of deeply impressive duets. It's next level stuff, as the young people say.