British Gas, OVO, EDF, Octopus customers warned they have 'until Monday'

The date millions of households must take a meter reading at every major energy supplier has emerged - as the price cap changes. Households on a standard variable tariff – as opposed to a fixed deal – and who do not have a smart meter should submit their electricity and gas readings to their supplier as close as possible to July 1.

That is to ensure they are billed accurately at the lower prices. British Gas customers can submit their meter readings on any date before July 14. Customers can do this on their online account, via the British Gas app, over the phone or a form which can be found on the firm's website.

You can call 0330 100 0056 Monday to Friday between 9am and 5pm. EDF customers can send backdated meter readings until the end of July 9 and they can do this via their online accounts, WhatsApp, SMS or a form on the supplier's website.

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Ovo Energy customers have up to 10 days after April 1 to submit their backdated meter readings - so July 11. Octopus Energy is letting customers submit their meter readings up until the end of July 8 and EON is the same.

EON customers can do this via their online account, app, by email or over the phone on 0808 501 5200, and the phone line is open from 9am to 5pm, Monday to Thursday and 9am to 4pm on Fridays. Martin Lewis told customers: “Most people pay by monthly direct debit, where your average use is taken over the year and it’s smoothed out so you don’t have big cashflow issues in the winter.

“That is based usually on estimates of what you will use. Because the price is going to be dropping 7 percent, if you allow your energy firm to estimate your usage, it could estimate more at the higher rate before July 1 than it does afterwards because if it’s looking across a couple of months it might choose to allocate some of those units that you use to the higher rate period.

“The real advice is, some point between now and next Wednesday-Thursday because you can backdate, go and get a meter reading.”