P Division - Two Way Cut

It was PC Phil Hamilton of Glasgow's P Division who found the corpse, on a stretch of rain-sodden waste ground, its severed head resting neatly on its chest. Forensic evidence revealed that the murdered man, a meticulous, hardworking accountant, had been killed elsewhere, and his body washed and laid out in immaculate new clothing. This ritual was only one of the puzzles P Division faced in nailing the murderer. Who was the oriental lady the victim had stayed with in a Saltcoats hotel? How was he involved with the Zambesi Club? And what was his connection with the Chinese restaurant which was burnt down on the night following his death?