British Airways will switch its Bermuda service from London Gatwick airport to London Heathrow from the end of March.The airline will fly Boeing 777s on the route, and the travel time from Heathrow to Bermuda is expected to be seven hours and 20 minutes.The first regular daily flight from Heathrow will be on March 28, and is scheduled to depart from Terminal 5.The BA service to Bermuda has already undergone a change this year. The service stopped on March 20 when regular scheduled co