Changing supplier when moving house

I am moving from a property with bills included to one without. I have a referral from a friend to use Blulb, but how would this work. Can I set up a new account straight away or do I have to start with the flats current supplier first, and then switch?

@georgehirst We do normally recommend that you let the current supplier know you have moved in and which meter readings to use then switch across. This is just to stop any extra delays if they block the switch to us.