if they are offering you a deal (which will be a comp agreement) then it's not resigning. the starting point should be for them to make you an offer. standard practice would be for them to contribute to your legal fees, so confirm with them how much they will pay. and then consult a lawyer - an enployment law specialist.
a comp agreement is them acknowledging that this is something unusual - you can negotiate and should end up with a deal you are happy with. it's not really a case of what you're entitled to (this has nothing to do with your contractual terms or statutory redundancy) - more, what are they willing to offer.
best of luck - sounds promising.
