Asking for my sister who is having problems with her ex. He has recently been released from prison and my niece doesn't really know him as he has been away for three years. My sister had been letting him have unsupervised contact with her up until it transpired that he has been putting her in dodgy cars without a car seat and has been driving under the influence of drugs. Since stopping unsupervised contact he has also made threats about taking her. Dsis has asked the nursery that if he turns up for her not to let her go without prior permission from her first however they have said that as he is on her birth certificate they can't stop him taking her. Surely this goes in the face of everything the nursery stands for in regards to safeguarding? It's making dsis feel like she's not even safe at nursery, the one place where she should be kept safe, are they right to say this?