I walked up to my usual entrance in the South today...
Steward: Hi there, you ok?
Me: good thanks, you?
Steward: where are you sitting?
Me: normal seat
Steward: are you in in S1A?
Me:??
Steward: if you want S1A you need the next entrance along
Me: I don't think I sit in S1A, I always come in...