Every single energy supplier in the UK is regulated by Ofgem, the industry regulator. This means that the smaller, lesser-known companies have to follow exactly the same rules as the bigger, more established ones. If a company goes bust, you’ll be covered by Ofgem – they’ll ensure your supply isn’t cut off, and they’ll appoint a new supplier to take over your tariff.
The Customer Information List includes the name on your electric account (corporate name, where applicable), your mailing and service addresses, monthly meter reading date, and rate class. In addition, your monthly kilowatt-hour usage (and demand where applicable) for the previous twelve months at your current location will be included. The list will be updated on a quarterly basis.