We were on the flight! Captain come on approx 30 mins before we were due to land and announced that the radar system was down and we weren’t being allowed to enter the Airspace and were being diverted to Got. We sat on the ground for approx 2 hours and then took off again and landed about 3 hours late. We were approx 30 mins late leaving Lhr initially due, the Captain told us, as the airport had closed for 17 minutes for the wedding.