JANE MACQUITTY admits that wine and barbecued food is a 'difficult marriage', and says that 'good, all-purpose warm-weather wines' work best, such as 2004 Lawson's Dry Hills Marlborough Pinot Ros (8.49 each when two are bought; Majestic); 2004 Casillero del Diablo Shiraz Ros (4.675.99; widely available).