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Pretty sure they’ll keep them for you as others have suggested on the thread.
If you want confirmation from BA without spending hours on the phone, try messaging them on Facebook.
It’ll take a couple of minutes to go past the chatbot, but once you get ‘connected’ to a human customer service rep, send a message Including your reservation number so they can look at the itinerary and confirm for you.
I typically get a response in 24-36 hours when I ask questions this way.