BA Silver exec club card holder query

MC wrote:
Scenario
---------

I purchase 2 economy tickets with Air Lingus (BA One World partner). One
for myself (silver member) and one for a friend (non member).

Bearing in mind it will be me who buys the tickets, could someone advise me
on the following:

As a silver member I realise I can check-in at a BA BC desk if I were flying
BA but what is the situation about checking in at the BC desk with Air
Lingus or am I not allowed. If I were to book with BA can we both check-in
at the BC desk even though one of us is not even a member.

I understand I can invite him, as my guest, into the BA BC lounge if I were
travelling with BA but what would the situation be if we are travelling Air
Lingus (One World partner). Can we use the BA lounge and if not will my
Silver membership allow the use of the Air Lingus lounge?


If you are at a Elite level of One World that gives you lounge access,
you have access at all OW partners, no matter which one you are flying.
I have spent quite a bit of time at the BA lounge at LHR even when I fly
AA and my Elite Status was earned in AAdvantage.