Business consultancy freelance - Copyright issue - urgent

[ExCharlieBucket]

I've been doing some freelance workunder a Nona disclosure agreement.
Work has involved a business plan. its well written and clearly my own work although obviously not a creative work such.

I do not have a formal contract with the owner.
He is now quibbling over money. He hasnt paid me anything.

Do I own the copyright and he can use he uses it until he pays me?

Without a contract specifying when the title/ownership passes, there's nothing to stop him using it.

but he doesnt have a contract permitting him to use it other does he?
Either way I have copyrighted it and if he refuses to engage with me will tell his legal team I have not given permission for him to use it.

In the absence of a contract, ownership of the goods is deemed to have passed upon them being handed over. If you wish to retain ownership, that has to be stipulated in the contract.

Ok thanks
I’m hoping to negotiate something in the middle

Why is he refusing to pay you?