Really sounds like this speaker is saying "padraig" or "phadraig" and not "failte." Cannot hear the f, but do hear a "p."
I agree completely ..I thought it was Padraig also.
Is the a in front of the name necessary
Yes. It's vocative casing and shows you are speaking to Calum, rather than about someone called Calum.
I played this several times trying to understand what Patrick was doing. Argh! I wish they would replace this voice.