When it opened to little fanfare 30 years ago next month, Bruce Robinsonâ?Ts directorial debut, Withnail and I, drew as much attention as it did commercial revenue: very little. It was a difficult time for home-grown cinema. The decade might have begun with Colin Welland, who wrote the screenplay for Chariots of Fire, claiming, â?oThe British are coming!â?? when he picked up his