Re: redundancy terms.
Strictly the previous payment is irrelevant, even if it was made by the same company. However, voluntary redundancies usually offer some incentive over statutory, so the precedent could be useful to get the voluntary figure increased. Also, if they are eliminating a "large" part of the workforce, it's a "collective redundancy", and they have to negotiate with worker representatives before the redundancies become final. A union would obviously look to precedents in this situation.