Capt J....just did a mock booking on the web and found this
07:40 12 Mar
09:15 12 Mar
Belfast
Heathrow (London)
BA5732
Aer Lingus
Economy
12:35 12 Mar
23:20 12 Mar
Heathrow (London)
Dubai
BA0107
British Airways
World Traveller
1 flight connection, total journey time: 11 hours 40 minutes.
Seems to code share to me..