A restaurateur has been found guilty of spiking a woman's drink with a date-rape drug at a Mayfair private members' club in a bid to overpower her for sex.Vikas Nath, 63, laced the woman's spicy margarita with gamma-butyrolactone (GBL) after she left him with the drink in the rooftop garden bar at Annabel's.

A restaurateur has been found guilty of spiking a woman's drink with a date-rape drug at a Mayfair private members' club in a bid to overpower her for sex.Vikas Nath, 63, laced the woman's spicy margarita with gamma-butyrolactone (GBL) after she left him with the drink in the rooftop garden bar at Annabel's.