Well UK I'm going to assume 210/220. So does give more power, but you need to really see the breaker box to know what you have.
Are you sharing the blocks with others? What is setup like? You will really need a room for these miners as sound in your room would be bad if you have a 1 bedroom and shared common areas.
Were running 230-240 here, of that im very certain(was a sparky in previous life lol) and setup wise im going to rack them in my always cool personal closet, same place as my PC, so I don't have to worry about annoying myself or anyone else with the noise.
A closet is not really going to work. It would get to hot with mining gear. You will need some kind of exhust to get the hot air out.
If you throw multiple S4's in a closet you will have some extremely hot temps. And chances are you can hear them through closet door.