A 16-year-old girl has admitted wasting police time after 419 hoax calls were made to Derbyshire Police.
A youth court in Derby heard that 90 calls were made in just one night. Some of the 419 calls were 999 calls asking for police to go to an address in Derby where a woman was being assaulted by her mother.
Bill Taylor, prosecuting, said that the 16-year-old girl and a 20-year-old woman were involved in making the calls. He said they both made the calls from the same mobile phone number.
Mr Taylor said one of the 999 calls claimed to be from a woman who told police: "Help, help, help. My mother is assaulting me. I need police urgently" and gave an address.
When police went to the address they discovered the woman at that address had not made the call and did not require the police.
Mr Taylor said Derbyshire Police were unable to say how much responding to the calls had cost but it had caused a serious impact on their ability to deal with genuine calls from the public.
He said it was impossible to say how many of the 419 calls the 16-year-old had made directly. Her defence solicitor said she was not involved in the majority of them.
The case continues.