Originally Posted by lincolnite

Just been to Madrid and back on the BA/Iberia A340 via T4S. The signage is poor everywhere on arrival at the main part of T4 but that is where you go through security (much like T5 at LHR).

Going by the departure boards. which just said 'from satellite', we went straight over to T4S on the train. As you come up the escalators you have to choose between the H gates one way and the S gates the other. Since the boards did not yet specify the gate we were then somewhat stuck. The agent at the split point said we had to go where the dep boards indicated and when we pointed out they didn't she was unable to help further. We eventually managed to extract from her that the lounge was in the S gate section, and there was also clearly a passport control point that way (assuming non-shengen etc) so we went that way.

Once in the lounge, the boards updated to say it would be from an H gate - panic! We asked whether we could get from the lounge to the H gates and yes, apparently you can via a special gate and a bus. When she realised we were on the A340, she said that it was a mistake as the 340 always went from S gates - probably S16. Sure enough, the boards eventually changed to S16. Had we waited, say in the T4 Dali lounge, for the boards to show the gate, we would have ended up stuck in the wrong gate section in T4S and without the decent lounge. Arriving early at the airport would not have solved any of that.