So there seems to be a variety of reasons some people will vote no:
1) Purely because it's a two year deal.
2) There's going to be a bigger pay differential between units, and those at the quieter units feel this unfair and those at the busier units are being greedy.
3) There have been some 'short cuts' on the criteria for grading the units.
Can anyone point me towards a document where it says that movements outside CAS were not included or judged to be unquantifiable?