A Berkshire family could be facing a huge bill after a section of their back garden collapsed overnight.
Aadil Asghar, whose family have lived in Earley, Reading, for 24 years, said the 15ft (4.5m) hole appeared on Thursday 26 May.
Both Wokingham Borough Council and the family's insurance company say they are not responsible for the cost of filling the hole at the privately owned house.
It is believed it is the result of a collapsed chalk mine shaft.
Mr Asghar said: "We were just gobsmacked. We are worried.
"We can't sleep at night. We are always having a peek out the window just to check it's not getting bigger.
"Trying to fill this hole up is probably going to set us back £20k or £30k."