I know there are already threads but just to add. Service: 1D55 Leicester to Derby - MML Train: HST Weather: Dynamic, Clear. Month: 19th April. Platform: PC/Steam. I received an emergency brake approaching Mountsorrel on the Down Fast. Speed limit was dropping from 120mph to 110mph in the area. I had regulated my speed in advance to 109/110 mph anyway. Assume I tripped TPWS grids for whatever reason.
Just to update out of curiosity, I tried to service again, exactly the same setup. I regulated my speed to 107mph despite the speed limit being 110mph and was tripped by TPWS grids before the entrance to Mountsorrel.
I have the same issue but with the class 158 on 2L45 after going through TN 4949 coming into Nottingham