Things like working time regulations, so that employers across the EU have to abide by the same technical regulations. Things like making employers only make their employees work ~40 hours per week, and yet the EU is blamed for the 'Working time directive'.
There are other things, like animal welfare with the transport of animals, where the EU gets blame for the regulation, but the reality is that there would have to be regulation for the amount of time animals spend time in transport. Because the regulation is headlined as 'EU' regulation the EU gets the blame. The point is that there would UK regulation if there wasn't a EU regulation.