Was down there last Saturday actually, part of the evening tour group. There was this one corner near the old wine cellar section where the temperature just dropped noticeably, not like a draught, more like stepping into a cold pocket that didn't move. My mate felt it too so I know I wasn't imagining it. What got me more than the cold though was this low-level sense of being watched that I couldn't shake for a good ten minutes after we left that room.
Did anyone else get anything near the stairs leading down? A few people in our group were uneasy before we'd even reached the bottom, which is interesting because they hadn't been told anything about the history beforehand.
Would love to compare notes if anyone else was on a tour around that time. Particularly curious whether the experiences cluster around the same spots or if its more scattered throughout the space.