Sorry, didn't know where to put this.
A bit of background: Dh has been working in a job for less than minimum wage. He gets the money cash in hand but is registered as self employed and declares it all, pays voluntary NI etc. He has been working there for 20 months, put in all hours, ended up managing the volunteers etc. He is looking to move on now as it's not sustainable. We want to move to a larger place soon and it's simply not enough money (which the boss think is 'grabby' btw).
This is where the problem starts. He has no real contract so just after Christmas he spoke to his boss about wanting to move on. Boss said, fine, give me 1 week notice when you want to go. Boss then offered him 50p more an hours but dh said he still wants to go. His boss is not looking for a replacement though and has now said that when dh goes he will give him a bad reference for 'leaving him in the lurch'. Dh thinks that there is no way he can get away amicably.
We are wondering how to go from here. Could dh explain the situation in an interview? Does he have to put his previous employer down as a reference? WWYD?
Apologies for the essay but any input would be greatly appreciated.