Okay, gotcha.

Working my notice period has never be even an issue for me. It gives me an opportunity to wrap up projects, say goodbye to colleagues, etc. It's usually fairly light work as well, you're not taking on new responsibilities. I didn't even realise it could be otherwise.

The reason I'm saying it's part of the redundancy package is because (some?) companies will pay off your notice period without you having to actually work it. I've taken voluntary redundancy only once, and I was told that I would stop working at the end of the month, but I was still paid my full 3 months of notice (in addition to the tax-free redundancy payout). That was not part of the initial contract.