Arrange the ribs on a wire rack in a large roasting tin. Combine the remaining ingredients in a bowl. Brush the ribs generously on both sides with the marinade.
Roast the ribs in a preheated oven, 200°C (400°F), Gas Mark 6, for 30 minutes.
Baste the ribs again on both sides with the marinade, using a clean brush, and roast for a further 30 minutes until golden and sticky.
Remove from the oven, brush over the remaining marinade and leave to cool for 5 minutes before serving, divided into 4 portions.