Four years on from their landmark Grassroots, visionary half-time heavyweights The Untouchables return with their third album, Lost Knowledge. The duo of Kate McGill and Ajit 'Nitrox' Steyns have carved out a space in modern D&B all their own, building on a legacy that reaches back to the late 00s to keep pushing into unexplored terrain with an assured and deadly line in rhythmic intrigue and atmospheric immersion.

Lost Knowledge launches into action instantly with the high-pressure drum science and dubby splashes of 'Drunken Bells', capturing the loopy techno propulsion and rolling intensity that drives so much of the output on Samurai Music. Where The Untouchables excel is in finding variety and nuance in their relatively forbidding, pared down sound. The heads-down groove of 'Mafia Town' owes as much to dembow and dancehall as D&B, while 'Lost Knowledge' spirals out into psychoactive flurries of synth strafes and organic percussion slathered in tight-locked delay trails. There's no light relief from strident hooks or riffs, just a pure, unshakeable commitment to the power of the beat and deeply designed layers of sound shaping out the space around.

'Busy Bones' makes space for carefully deployed hints of pad tone while the snares snap out of the mix with a sharp set of teeth. 'Four Eared Demon' baits the gabber crowd with its rapid-fire 4/4 hats atop seasick creaks across the midrange, keeping subtlety and patience in the lower frequencies to maintain the signature elegance readily associated with The Untouchables. 'Phase Correlation' teases an artfully unhinged ripple of synth that stands out amongst the murky murmurs filling out the middle distance, but it's still exercised with brutal precision.

Nothing happens by accident or feels out of place - McGill and Steyns are in total control, and they demonstrate incredible range and inventive approaches within their focused style. The accent of the grooves shifts, and individual sounds carry all kinds of artefacts, yet everything gets folded into the exacting Untouchables sound with a liberal dubwise sensibility. Brimming with inspiration and immaculately produced, on Lost Knowledge their one-of-a-kind sound is stronger than ever.