GB’s Nick Dempsey takes windsurfing silver and thinks twice about packing in

• 36-year-old may carry on after third medal of Olympic career• Finishes second to reigning champion Dorian van RijsselbergheEven Nick Dempsey’s dad seemed to agree that windsurfing is not the most comprehensible Olympic spectator sport. “Oh, you won’t have a clue what’s going on from here,” said Mike Dempsey cheerfully, standing in sandals and shorts on the beach at Marina da Gloria. “All you need to know is that Nick is going to get another silver