Originally Posted by csdavidson

I think they do check...at least at LGW.

I was with my g/f in GF having breakfast (we just landed from an earlier connecting flight). Our friends were on the same flight, so we left to GC (my g/f is Silver) and there was some confusion as our boarding passes had been scanned.

Thankfully some common sense prevailed and they ignored the warning on the system.... but I guess it could have bene abused.