new home switch to Bulb

I register with Bulb because I am going to move into my new home this week. But the service of Bulb only starts from June 1st. Can you tell me what I should do with my electricity and gas in May?

Thank you very much!

You stay with the current supplier until the switch is made. If it is a new build the builder will have allocated a supplier which will change on the 1st June.