Never been to that specific one but the east wing thing is interesting - in my experience its almost always the east wing or basement that gets flagged up, which makes me wonder how much of it is suggestion vs actual phenomena.
That said I've done enough locations over the years (Nottinghamshire's got no shortage of grim old buildings) to know that sometimes a place just has a weight to it that you cant explain away. What specifically felt off? Temperature, pressure, sound, just a general dread? Because those are very different things and people lump them all together as "something felt wrong" without being useful about it.
If you've got readings from that visit post them up. EMF, temp logs, anything like that. Otherwise its just vibes and we cant do much with vibes.