Indeed they do - getting a supplier is crazily difficult. I moved in 5 months ago, and most suppliers when you call them will ask your estimated consumption. The magic figure is 12 thousand KiloWatt hours a year. Below this, and they say no. I called the people on my meter. Nope. I even called my domestic supplier and spoke to their business people - they said no too. In the end you have to use one of the agents, and they found me British Gas Light - one of the few willing to supply people below the 12K limit. Apparently so many small businesses closed, leaving them with a bad taste - so they just just don't want small businesses. British Gas Light was, in fairness, the first toileting say yes - but their rate was about the same as my domestic supply so I just went with it and it's been quite smooth so far. Water is exactly the same - finding a supplier for that was just as hard.