Standard MCT is 45mins but BA does have several exceptions of 1hr or 2hr depending on flight numbers.
Here are the MCT's:
Results from ExpertFlyer.com
Code:
Minimum Connect Times:
Connecting at DUB
Incoming airline BA
Outgoing airline BA
STANDARD.D/D...D/I...I/D...I/I.
ONLINE .45 .45 .45 .45
OFFLINE .45 .45 .45 .45
** OR * ARE ALL
BA-BA DI 2.00 FLT 5800 - 5999 - FLT 1500 - 1610
**-BA DI 2.00 ALL - FLT 1500 - 1610
**-BA DI 2.00 ALL - FLT 2290 - 2369
BA-BA ID 2.00 TRM 1 - 2 ALL - UNITED STATES
BA-** ID 2.00 FLT 2290 - 2369 - ALL
BA-BA II 2.00 FLT 1500 - 1610 - FLT 5800 - 5999 TRM 2 - 2
BA-BA II 1.00 FLT 1500 - 1610 - FLT 5800 - 5999
BA-BA II 2.00 FLT 5800 - 5999 - FLT 1500 - 1610
BA-BA II 2.00 TRM 1 - 2 ALL - UNITED STATES
**-BA II 2.00 ALL - FLT 1500 - 1610
**-BA II 2.00 ALL - FLT 2290 - 2369
BA-** II 1.00 FLT 1500 - 1610 - ALL
BA-** II 2.00 FLT 2290 - 2369 - ALL