Well i work over just over 4 hours a day. I normally clock in about 10.50am & clock out 2-3 minutes after 3pm.
I think they said I got to work 5 1/2hrs or more to earn a break, you are then allowed 20 minutes.
Where I work, it can be very strenuous day. A lot of lifting, e.g, Washing Machines (stacked 2 high), Large Generators, & furniture like wardrobes etc.
We also have a lorry that comes from China (every Friday) & it has to be hand balled off (no pallets) normally a 60ft lorry too, jammed packed tight. All of the stock has to be put on pallets ourselves & when we empty the lorry, its a case of taking in the store & breaking down the pallets (taking stock of the the boxes) & then working them on the shelves.