Formerly linked to the late-’90s big beat movement, Barry Ashworth’s Dub Pistols have become one of the UK’s leading exponents of political dubtronica. Jamaican Studio One veteran (and sometime Massive Attack collaborator) Horace Andy adds guest vocals to opening track “Sound Clash”, eclipsed in the surprise stakes only by the appearance on “Problem” of former Specials frontman Terry Hall, making his first outing over a ska beat for decades. Electro, jazz, dancehall, hip hop?everything’s here, mashed up in a smoky dub haze.