Are you seriously suggesting that JT's cartographic skills are so poor that the small darkly shaded rectangle on her map represents the whole of apartment 5A? There is a doctor on TV who repeatedly shows a large space cunningly fitted inside a tiny space, but I found out recently it is complete fiction and not true at all. I suggest the large lightly shaded area is the building, and the small darkly shaded area is the exterior alcove in which the main door of 5A is recessed.
The only problems with that Pegasus are that
1) Jane clearly indicatede in the Cutting Edge video where Gerry and Jez stood chatting . On the corneer.
2) The front door recess has the kitchen standing out between it and the pathway up the street, so sorry you aren't right on that one
3) In any case, the front door access was completely out of sight of Jane when she was walkiing as there was a damned high wall in between. Also it was one floor up, out of sight.
From her actions on the Cutting Edge Video, Jane very obviously meant that the two men talked on the corner of the alleyway. You cant get away fromk that.
The main thing in contention is not about the building anyway, but about where Gerry and Jez stood. Jane clearly indicated that they chatted in the area near he corner of the alleyway to pavement/roadway
You cant get away from that Pegasus.
And Jez confirmed it.