I have an interview this week that I'm really hopeful about. But my boss is a nightmare. She takes everything personally and has treated past employees really badly on leaving (and while in post - which is why I'm trying to escape). It wouldn't surprise me if she refused to give me a reference. I know my 2nd referee will give me a great one, but she's not my "current employer". Let's say I get the job subject to references, and my boss either refuses to reply to them or gives me a bad one (that's less likely to be fair, her M.O. would just not be arsed to respond out of spite.) What would happen then?