Thanks for the replies, just wanted to update as I don’t see many coming back with one.
My insurance company has agreed to pay the claim.
It was due to failing waterproofing and many building defects of the balcony, i.e. no overflow drain etc.
I had it redone out of my own pocket before being apartments below sought me for damages.
Total amount payable was north of 5 figures so very grateful for this outcome.
