Yeah, that tower is intergral to the whole, more than likely there will be nothing done without a solution for the tower, one way or the other. It's probably more economical to seal off part of the tower and redevelop it in portions, levels being rehabbed as you go. Windows would be a start throughout. If Matty was serious about this,. there would be windows to stop the infiltration.

Ask him why that is, next time you see him... unless you already know the answer?