Here, somewhat belatedly, are details of terminal changes for flights departing from London Heathrow from 31 March 2013.
From Terminal 1 to Terminal 5:
British Airways flights to Dusseldorf, Leeds Bradford, Toulouse and Zagreb (and Almaty from 2 April 2013).
From Terminal 3 to Terminal 5:
British Airways flights to Larnaca, Singapore and Sydney.
Movements of flights to Terminal 5 are usually accompanied by transfers of flights out of the terminal. However, there appears to be none on this occasion. This is probably because of frequency reductions on other routes due to BA being required to hand over nine daily slot pairs to Virgin Atlantic for its “Little Red” domestic service to Manchester, Edinburgh and Aberdeen.
These changes leave the following BA operated flights in Terminal 1:
Amman, Baku, Beirut, Belfast, Cairo, Dublin, Hanover, Luxembourg, Lyon, Marseille, Rotterdam, and Tel Aviv.
These changes leave the following BA operated flights in Terminal 3:
Bangkok, Bucharest, Budapest, Gibraltar, Helsinki, Lisbon, Prague, Vienna, and Warsaw.