I am not sure all of that information is correct Rex. The bmi pilots have DOJ bmi for service so are much more senior than their MSL number. There is also command protection from the integration so even if there are more senior pilots at LGW they would not displace those protected commands. This is all legally binding so opinion is not involved in the decision making. I would be pretty sure this is a BA thing not a BALPA one. It’s been seen before, geographical location used as the primary selection because it is very difficult to challenge and legally very secure for the company.
What needs to be done is to give priority to 320 pilots to move to 320 LHR regardless of seniority.