Dan, you're information is wrong.
If the guy immediately below the line is being made compulsory redundant next month suddenly finds that the line moves below him, he will STILL BE MADE REDUNDANT. That is how the management are interpreting the agreement. It is morally wrong and very probably legally wrong.
The company have already decided that he has been made redundant. As the policy currently stands you will be called back first as you are on UL, despite the fact that you joined 2 1/2 years later.
Not LIFO as I understand it.