I take it there is no H&S plan, risk assessments or method statements, in fact the CDM Regulations have not been followed at all.
Quite serious beach then, and that's besides the asbestos issue.
And then comes the landlord and tenant issues for the new occupant, and the Defective Premises and Occupiers Liability law and negligence.
But fundamentally, there has been a potential asbestos release and exposure. If this is not reported and recorded, then if you do develop symptoms in the future, you have no claim.