possibly got a job coming up karndean in a kitchen diner through in one, problem is, the levels are out by 10mm. The existing floor that's down in both areas is possibly granwood finger blocks that's well stuck to a concrete base that's sat on a block and beam subfloor with a cavity , can you screed over the blocks or is it a definite rip up?
Definitely rip it up now, the chances of it coming up by itself within the next 12months are too high to take the risk