BALPA will be completely useless. Always are.
As for the CAA, they might take notice in a few years when they see most newly qualified pilots in the UK applying for EASA licences. Only when their revenue stream is affected will they do something.
I considered converting my licence to a EASA one last year, but the CAA told me at the time they couldn’t guarantee I didn’t have to do the 14 exams to get the UK one back, since at the time nothing had been decided. So I couldn’t take that chance.
At the moment I will look into jumping through the hoops to do what is necessary to get a EASA one. But I think I’ll draw a line if it means I have to do a skills test in a 747-400 sim (which of course is now a completely useless rating).
In the meantime, I guess I’ll wait until Jet2 open their recruitment.