Martin Lewis says we should take a photo in our homes today to reduce energy bills

Money Saving Expert Martin Lewis is urging everyone to take the same picture in their home today. With energy price caps set to rise tomorrow, the finance journalist has told anyone who has a normal or pre-payment meter to take a photograph of it before midnight.

He says that it's crucial to submit a meter reading before April 1 if you want to make sure energy providers don't charge you the new rates for electricity you used before they came into place.

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Speaking on ITV's Good Morning Britain, he said: "One big thing I would say to you is take a picture of your pre-payment meter on the 31st March.

"If they do try and back charge you, you can say I know exactly what I was using up until that date and email it to yourself so you've got a timestamp on that so you can prove it was taken on the 31st March."

Explaining why it's so important, Martin urged people to get their meter readings into their supplier.

Speaking yesterday he said: "The most important thing, tomorrow - the 31st March - if you're not going to remember tomorrow, do it today," he added.

"Because that draws a line in the sand with the energy company. Every single of unit of energy I have used until this meter reading should be charged at the cheap rate. Don't go estimating it at the higher rate. So get your meter reading in, preferably tomorrow. You don't need to if you're on a smart meter, it does it for you and get that line in the sand drawn."

The energy price cap is set to rise for those on tariffs who pay by direct debit by £693 from £1,277 to £1,971 from April 1. Prepayment customers are set to see a bigger jump, with their price cap going up by £708, from £1,309 to