Whenever you want to compare business energy online, it is very vital that you provide all history and data associated with your former contract as this will aid the new provider key in certain new data in alignment to the previous info available.
With this available – ensure you are ready with all the likely details as when you contact a chosen provider - you will be demanded to supply your meter point registration number (MPRN). This can be found on your utility bill and on your meter as well. This new provider will demand for your address and meter reading, so ensure you have these details on ground. When supplied, they proceed to initiate further required arrangements with your old supplier to have your account switched.
Note also that there won’t be extra charges for switching to a new energy provider except you have a fixed term contract that binds you to your former provider for a given period and term.
You surely need to provide your history and data on your previous business energy bills as this will help you continue with the new provider without breaking rules of contracts between the 2 providers.