Sorry to chip in. The big problem is that the repairs service does not know about the capital works service.
Therefore they don’t know whether something is under guarantee or not.
Seeing as how repairs don’t care about the cause of the issue they will never know , nor do we a lot of the time,
whether the cause was bad workmanship on the initial work or just another ongoing problem.
I have had to go to Freedom of Information to find out guarantees ( or lack of ) on for instance
a large boiler that was installed and broke within a few years but it only cost a million quid
so not to worry. I imagine the leaseholders will manage to cover some of the costs in time.