I think most people here are totally confused by the multitude of companies trying to get them to switch suppliers. "Switching" of course, just means that they have a contract with and pay a different company -- There's still only one distribution network in any given area, which to my mind makes the whole thing rather ridiculous. Just about everybody is getting in on the act now, even British Gas (yes, a gas company!).
It's the same sorty of mess as with long-distance phone service. Just look at how many outfits are out to convince you that their deal is the best. As with electricity, it's just too complex for most people.