I had posted this in an area of the forum I thought more appropriate, but received zero replies... so I am hoping my trusty BA Forum friends can provide some insight 
.. Mods, apologies if not appropriate to post here.
I am a Barclays Avios Premier Current Account holder and a Barclaycard Avios+ credit card holder. As a result of this I get the perk of 4 x lounge passes per year.
I rarely use them as I usually fly only BA (or one world) in Business Class, and have lounge access through status anyway with the Executive Club if I do fly economy.
With my wife I am travelling from ALC to LGW next month. Club Europe with BA. My parents flight is at the same time but they are flying with a non oneworld airline, so I can not use my guesting privileges to get them in the lounge at ALC.
Is it possible to use 2 of my 4 lounge passes from Barclays via the Dragonpass plus app on my Mother and Father? And me and my wife get in on our BA Business Class boarding passes?
Thanks in advance everyone