My partner's ex is causing problems. They have a 5 year old child together. He has said to my partner before that if I don't leave her he will make up a story to the police about me being a paedophile. He said this to my partner in person and she was recording the conversation on her phone without his consent. He has now been referring to me as a 'kiddy fiddler' for a month now and has stated that he has filed reports about it. My question is, could that recording be used in my defence if he does indeed make these allegations, and I have to go to court to defend myself, even though he was not made aware that he was being recorded when he made the defamation statement?