Redundancy Laws/guidelines.

[Beechy101]

The company i work for are currently in the process of making 900 people redundant, My question is that after the notice of redundancy has been issued is there a time limit before they can change the redundancy policy (ie - reduce it to statutory)?

[fiction-factory]

One factor here is whether the enhanced (ie above statutory) terms are clearly stated as contractual or are stated as discretionary.If the latter then they may be able to reduce them; if the former then they need to give the contractual notice period regarding the change.
I think a company would be unwise to try to change terms after issuing redundancy notice- it would make more sense to announce the change to terms first.
In your case, as there are so many people involved the employer must issue a consultation document about the redundancies. ACAS say that as part of this the employer must disclose details of how redundancy payments wlll be calculated. I can't see how they can then change that