Whatever work needs doing is usually shared jointly between all the leaseholders. The leaseholders pay the freeholder and the freeholder does the work. In the absence of a freeholder then to a great extent, you're on your own. He is talking a load of rubbish about it being sorted out between you and the previous owner. He bought the property with its faults and knowing that he would be responsible for the cost of repairs.
If he simply won't do the repairs, then all the leaseholders are faced with doing them themselves and suing him for his proportion of the costs.
However, not all the repairs that you mention may be the responsibility of the freehold. Often the leaseholder is responsible for the floors to the depth of halfway down the joists and the ceilings halfway in the joists above.
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