Who can resist firing up the barbecue when the sun appears? Most people are only too willing to hang out in the garden on a glorious summer’s day, grilling juicy steaks and sipping chilled wine. But don’t get too relaxed. Even casual get-togethers have unwritten rules. Good behaviour cannot be abandoned at the gate! We look at the Dos and Don’ts of attending or hosting a barbecue – practical suggestions that will ensure everyone leaves with happy memories of the event.