I'm not sure that turning toward the runway from downwind at LPMA is such a good idea, with the runway being so near the high ground.
When you are downwind at LPMA for runway 05 you follow the missed approach until the missed approach point (downwind). After that point you have to decide how you are going to establish on that missed approach, probably with a left turn before the end of downwind and once you have started the turn towards GELO you need to keep the right turn going all the way around to intercept the missed approach course to FUSUL.
So it still follows the rule of following the missed approach for the instrument procedure you flew, just once again requiring a bit of thought as to how you are going to position the aircraft to safely establish onto this missed approach procedure.
PP
Edit
Crossing posts here I think! BOAC, yes of course it was trailing edge, I remember seeing the steps now and they were behind the wing. Bloody tall set of steps though, more like the ones engineers would use to reach the top of the wing, not sure what they were using them for, perhaps looking for de-ice requirements? Glad they got back home (I guess the crew probably would have preferred the chance of some French cuisine though)!