I'm moving to a home with pay as you go meters: What do I need to do?

I'm moving from a home with a pay as you go meter: what do I do?

Can I use the previous tenants' gas card or electricity key?

I have a pay as you go meter, how do I transfer to British Gas?

I'm moving to a home with Pay As You Go Energy™ meters, what do I need to do?

I have a pay as you go meter at my new house, how do I find out who supplies the gas or electricity?

I'm moving home and have a credit balance on my meter