A top restaurateur was caught red-handed spiking a woman's drink with a date-rape drug at exclusive private members' club Annabel's, a court has heard. Vikas Nath, 63, allegedly used a straw to put gamma-butyrolactone (GBL) into the woman's spicy margarita drink while sitting in the rooftop garden bar at the Mayfair club. Southwark Crown Court heard staff at Annabel's noticed Nath dipping the straw into a small Madagascan vanilla extract bottle he had retrieved from his pocket, to suck up