This works. I just registered last night and got confirmation today.
(I've quoted below from a forwarded email I got so perhaps a lot of ye have already seen this)
Aer Lingus are giving BMI Diamond Club members a free Gold Circle membership. I think they intended to require BMI Silver membership, but they didn't, only Blue is required. But you can sign up for the basic BMI Blue card online without even flying, so this is basically a way to get a free Gold Circle card for a year.
“As soon as you have received membership of the Gold Circle Club you will be able to earn Points towards free flights while availing of lounge access at most airports served by Aer Lingus. “
Doubt if there’s free booze but you get access to a lounge which might be worth it for those of you who fly a lot. You might get to meet Bill Murray or something (who doesn’t want to meet Bill Murray?). The worst that can happen is they spam you to death.
1) Sign up for BMI Diamond Club blue card at
2) Download your "virtual membership card" from the BMI site
3) Go to http://www.aerlingus.com/goldcircle/
and sign up as an "applicant" (if you don't already have a Gold Circle number)
4) Got to http://www.aerlingusgreendiamond.com and fill in your details. Upload your BMI virtual card as proof.
5) Get your free Gold Circle membership in the post.