I have a house here in London where in the kitchen the cold tap is on the left side and hot on the right side while in the bath rooms it is hot water on the rig

I have a house here in London where in the kitchen the cold tap is on the left side and hot on the right side while in the bath rooms it is hot water on the right side and hot on the left side of the mixer tap. Seriously I have no idea why the developer thought this was a good idea. At least once a week I get surprised by the hot water when washing my hands :)