You should have seen what they wanted to do to your pension - and they could have - they can alter any of your conditions with 6 months notice.
there is a lot more we could do with 6 months notice. go back to minimum unit requirement. give up ojti, lce, stop bandboxing on nights. no shortcuts, no high speed etc
oh yes, i nearly forgot....we could organise a cracking tea party at the front gate. all invited. bring a donkey jacket and your own oil drum