Can my boss change my shift patterns out of the blue?

ah23

I work 20 hours per week on paper.

But I have actually been working one hour extra per week in the last hour before store closes on Sunday, this was since this contract was signed in September 2015.

I did this to help the company, but now with the increased wages, they're putting me back down to 20 hours but imposing new shift patterns so I have to work the last hour on a Sunday (that I have been working as over time since at least summer 2015).

Can the company do this? It doesn't seem fair at all as I did say I could help now and then but can't on a permanent basis due to personal commitments, the boss said they would impose this new shift pattern upon me if I do not have a reasonable commitment?

My contract does say I may have to work other hours for the good of the company, but I can no longer to the final hour of Sunday since they changed me back down to 20 hours...
Where do I stand?

Torry_Quine

Depends entirely what your contract says as regards to hours worked. If it says you are employed for specific times then you may have a case but remember you can be sacked for any non-discriminatory reason with less than two years employment.