u/Icy-Invite-3431

I'm looking at buying a property (cottage, in England) where, a few years ago, an application for retrospective listed building consent was refused. It was to do with a change of windows. I can't see any evidence on the council website that the windows were replaced back to the original type. Should there be a document on the planning portal? I'm concerned about this as I know liability transfers to the new owner. I have contacted the agent and am awaiting more details. It also appears that the kitchen and bathroom have been redone, with lots of nice new tiling. I presume cosmetic interior changes don't require LBC? Anyway, advice would be most welcome.