Academy's and MATS is a difficult one.
I've ALWAYS been against them because imo it's semi privatisation.
However, I'd a MAT or single academy trust have taken over an unsafe building from the LA I think there should be an agreement to share the cost. There should have been surveys of buildings by academies if they were taking on the buildings and accepting responsibility for them. They aren't afaik renting them from LA they just acquired the school and the buildings iyswim?
But whatever the finer points this is children education and the buildings need sorting. They can find the money when they want to for things. So they need to find it for this.
Perhaps Sunaks wife could get in with a company who assess RAAC or fixes buildings. I bet they'd find the money to pay the contractors then 