Megaton
At least one BALPA rep is currently commuting from Canada unless his phone number and contact details are out of date. Another rep commutes from the U.S
No matter where they commute from, I don't think anyone in BALPA doubts their dedication to the cause. The time and effort expended by the reps in general, and by the Head Office Team of the BACC in particular, is immense, and not worthy of the snide remarks being made. Without them and their efforts the lot of the BA pilot would doubtless be much worse.
The very fact that the pilot strength in BA is 4000 and growing is testament in no small part to the way that they have picked a path through the minefield of the last decade.