I had to underpin the house, damp proof inject the walls,

Neither of these are required, BCO was wrong to insist on those.

Depends if there are any alterations that influence part of the
original structure.

excavate the floor, put in a dpm, radon sump.

fair enough. And insulation.

Not if the work undertaken was a repair.

I'd stay away from the listing idea, not that you'd get it anyway.

Spot listings are quite possible.