Scores of people were given overnight shelter in the visitor centre, including Georgia Gifkans, 14, from Stevenage, who had been staying with her father at a bed and breakfast. She said: "My father and I got onto the roof of the Riverside Hotel. It was frightening." A police spokesman appealed to people in the area yesterday or who abandoned their cars to let them know they are safe. "As we find where some of the unaccounted for people are, others join the list," he said. Two search and rescue trained dogs are being flown in by helicopter to help the search.