StainesFS
If we assume that all altitudes in the graph should be shifted up by about 175 feet, and adjust the graph accordingly it shows a somewhat different pattern. The graph shows the aircraft crossing the G/S at about 10 kilometres, staying above it for a time before steadily falling below it. Making the altitude adjustment I mentioned, the pattern shows the aircraft always above the GS but getting steadily closer until reaching it at the penultimate data point (the 75'/250' one). At this point, the sudden increase in the sink rate takes it sharply below the G/S until impact.
Thanks for your contribution. I think you are right and it corrects the impact point and also this -4096.
I think it makes the picture a lot clearer. But well, I'm not a pilot...