Once you’ve found the gas and electric meters, you’ll need to take a meter reading (if they’re credit meters) and submit it to the supplier when they set up your account.
If you’re disabled or elderly and you’re finding it tricky to read the meter, give your supplier a call so they can send someone to read it for you. It’s also worth asking them about the Priority Services Register, a free service offering prioritised assistance for customers in need.
It’s a good idea to submit readings every month or so, to keep your bills accurate. If your new home has a smart meter, it will automatically send the readings to your supplier, so you don’t have to.