I have just checked my flight times for BA0248 and they are listed below but do no seem right:-
Flight BA0248 to London on Sat 14 Feb 2015 23:55
Depart Sat 14 Feb 2015 23:55 Rio de Janeiro Intl (Int) Terminal 1
Arrive Sun 15 Feb 2015 13:15 Heathrow (London) Terminal 5
0 stops, 11 hrs 20 mins, Club World, Confirmed


the 11 hours 20 minutes sounds right for the flight time but the departure and arrival time do not match the 11 hours and 20 minutes I make it 9 hours 20 minutes am I missing something? As BRT is 4 hours behind BST

checking flight aware would also back this up as most flights are leaving at 22:00 getting in 13:00? Has BA made a mistake?
http://uk.flightaware.com/live/flight/BAW248