It should do, but it almost never does, and hasn't since the Unions lost all power. The OP is at least being offered an uplift - many companies would just point to the small print of the contract and demand that they suck it up or resign.
Bearing in mind that there is endless evidence that night shifts shorten your life, a decent rise is the least they could do.
These hours aren't mandatory, they aren't forcing them on me.
It just saves them a recruitment nightmare. It's a very very niche sector we are in and everything has to be taught to absolutely everyone who comes in. Me and another guy were the ready made solution and they are dicking all over it.
I'll see what they say tomorrow, but the ones doing this don't understand the consequences to their stance yet. Once the fines start hitting because they can't maintain service, they might back down.
They won't even have any one to train any newcomers on the shift pattern also..... their attitude is ridiculous.