Simplify the following text for a Grade 7 native English-speaking person.
Original: On 27 March 2008 , British Airways moved almost half of their Heathrow operating staff , equipment , and aircraft to the new Terminal 5 . The vast majority of British Airways services to and from Heathrow operate from Terminal 5 , with the exception of some service flights which will operate out of Terminal 3 .
Simplified: British Airways intend to move these routes to Terminal 5 .