A British man has died after a bus carrying UK tourists plunged down a ravine in the Canary Islands yesterday - as police say they investigating a potential brake failure. The 77-year-old, who has not yet been identified, is one of 27 British passengers who were understood to be travelling to the San Sebastián de La Gomera dock where they were due to travel by ferry to Tenerife. Two men, 72 and 44, who suffered severe injuries, were helicoptered to a hospital in Tenerife, while another person