Of course they do Ian. A major bus opertaor uses Nemesis for all there cleaning, seats, floors, windows, even the garage floors. The take this in IBC's 1000 litres at a time. They use it because it works and because it is a safe product.
Some of the train companies use in house cleaners but most sub it out to either the big players like ISS or smaller franchises. Stainbusters used to do a lot up in Newcastle. They would come from all over the country and spend the weekend doing a mass clean. A lot of the big janitorial suppliers sell into large nursing homes chains and health care facilities. People like universities, hospitals etc take delivery of pallet loads every couple of months.