Bear in mind that there may be tax implications if you return to the same job within 6 months on being made redundant. Check with them that they will pay any tax liability or that they have followed the rules (or bent them by re-employing you as a contactor, or in a different role). As the tax man sees it, either you are redundant because they don't need you, or you are not. It may mean that you have to pay tax on your redundancy payment that you received in May.
Personally, as long as they are offering you a good enough deal, take it. But don't make it look you are desperate, they need you as well remember! If i had the chance to get redndancy and then come back 6 months later to do the same job, i would take it. I have been made redundant twice before, I have no pride! LOL