So if I understand it correctly, crews at BA are allowed to make the instantanious decision that they are inside the MSA-sector AND above the MSA, allowing them to disregard GPWS warnings (even in IMC), but when they are on the ILS over flat terrain with the RWY CLEARLY in sight and more then 10 km visibility they have to go around when there is a GPWS warning!!!
This doesn't make sense to me, so I'm with 411A on this one!
Perhaps BA should have a second look at this particular SOP!
Regards,
Sabenaboy (flying for a new employer)