Discussion on answer by Clumsy cat: Employer made me redundant, then retracted the notice after realising that I'm about to start on a new project

I would place more importance in negotiating a redundancy package for if you are let go again in the next year or two. It would seem likely to me that they will let you finish your project and then let you go again.

Asking for a pay raise after being let go for redundancy is idiotic. If they had money, they woulnt be letting people go. Asking for a raise is the quickest way for them to change their mind and show him the door... Again.

@LioElbammalf I love the boldness in which you say "No harm in pushing". The OP now finds themselves out of a job. We have no idea how much backpay the OP was entitled to. It's very possible employing the replacement is only slightly more bothersome than retaining the OP.