You wouldn't believe how tilted some of the buildings in Todmorden are, including the one that I am renting. I'll go out tomorrow and take some photos and post them below. Meanwhile ... here is the chimney breast in my kitchen. The spirit level is vertical!
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If I unlatch my front door and let go of it, it slams itself wide open!
Some friends had a flat above a shop in one of those very tilted buildings. When you walked across their living room one way it was noticeably 'uphill' and then 'downhill' when you walked the other way. I had a meal with them and they gave me a post-meal satsuma. I placed it on the table and it rolled off, then across the floor to the corner of the room!
The town is built on a flood plain and the foundations of the buildings probably weren't really good enough for the swampy soil.
A few of the local houses finally started to crack and had their frontages rebuilt last year. The builders made a good job of their work, but they had to build everything to match the tilt of the rest of the building. It is odd to see new doors and windows going in with their frames well off the vertical/horizontal.