I qualified in 2010 and have not yet started my induction. I've been working on supply and have joined a new agency but they said that my final placement headteacher is refusing to give them a reference for me. No idea why as I'm sure they've given them in the past and there was no problems on my placement. Can they do this? They are my last teaching school where I have spent a long length of time and my agency said they need their reference to get me work.