Considering the BALPA dispute has nothing to do with pay, I doubt they would be too bothered. They accepted that a start up needs low overheads hence lower salaries for all. It is in all our interests for them to win their battle because anyone who flew for OS could then switch over to mainline BA, seniority allowing.
Not sure whether pay would then be interlined with BA mainline though, they haven't won yet... but here's hoping they do!