A yachtsman has told how he looked vengeful killer whale White Gladis in the eye as she tried to sink his yacht - but claims he now knows why she is attacking boats.
Ian Hamilton was enjoying calm waters while sailing past the coastline of Gibraltar when he saw a fin in the water and felt a sudden thump from behind.
The keen sailor, nine days away from his Barcelona destination, noticed his 50ft yacht was being chased by a group of killer whales.
