Guido is always one to shine a light on shady deals in dark corridors of power, so watt’s this one all about? The two desk lamps in David Cameron’s Downing Street ohm retail at an austerity-busting £749. “Hand-assembled in Oxford from the finest aluminium, chrome and bone china”, the lamps were a freebie from Witney-based company Original BTC, lamp provider to stars such as Gordon Ramsay and Sex and the City’s Carrie Bradshaw. Guido found this whole story rather illuminating…