There will probably be some regulation that states that they all have to undergo the same tests incase some were built with different batches of material or some alterations have been made and not properly logged.
Its the sort of thing Process and Quality Management People (like me so be...
From the looks of things I would check your contract with them.
Looks like they were doing programmed works and only included the Asbestos bit as Major works?
if that is the case I would check through the contract and you may be able to get off with a technicality. Something like them...