Legendary UK bandleader Mike Westbrook’s 1972 Solid Gold Cadillac quintet, with the Ayleresque sometime-People Show actor/saxophonist George Khan, reappears 50 years after being the innovative Cadillac label’s debut (Live 1972), still as a gripping collusion of raucously sax-led free jazz, Cream/Stones-era guitar R&B and dreamily atmospheric themes, notably on an ethereal account of Westbrook’s famous Metropolis.