It is a disgrace, if Finnair don't want to allow OneWorld privileges to all, why don't they go it alone?
I was caught on Monday, BA boarding pass in Club Europe and Silver Card, but the guy was certain I had to use the long queue.
I pointed to the One World logo and he assured me that is for check-in and nothing to do with Fast track security...
Very poor service, that BA can't even negotiate this for Is premium customers....