Originally Posted by
Krisz
In Singapore there are big signs saying it is illegal to enter the airside if you have no intention to fly.
But the OP has every intention of flying, so he wouldn't be caught by this. It's just that he has no intention of flying on BA, nor of paying BA for the use of the pre-flight lounge.
Originally Posted by
TheJayHatch
Illegal? Unlikely. Fraudulent? Almost certainly.
It would be a rum world if activity which is "almost certainly" fraudulent is considered "unlikely" to be illegal.