Iwould say YES u are going to need PERF A,or the JAR perf,whichever u choose to do.Airline aeroplanes are mostly if not all,perf a a/c.So if u start applying without ,you wont fulfill there requirments.Bite the bullet and go get it in the bag.Even if u were lucky enough to get a job offer,its a sure fire thing it would be on the basis that u went and did it,otherwise u would,nt be qualified to fly a perf a a/c.Off u go and get stuck in.