Gah! I still can't see how that is legal*
1. Company offers pension deal A giving X, or pension B giving X plus 10%
2. Person signs up to pension B (no brainer as planning to serve to 55)
7 years later Company rips up all previous meaning that pension B is no longer obtainable to those that made positive choice based on Company figures, so it's now worth LESS than the original pension deal A, that they wouldn't have moved from if the Company hadn't made it benificial to do so.
How can that be right?
* moral