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They also switched to a new dishwasher that slashed consumption by 26 percent, or £31.31 a year.
They also had a new double oven installed which reduced their usage by 40 percent, saving £50.86 over the course of a year.
Dr Martha Newson, founder of Newson Consultancy, said: “With a topic that has been so prevalent in the news, we wanted to work with a family whose habits could represent the majority of households across the nation, so that we could share tips that would work for us all.
“As far as I know, this is the first experiment of its kind since the cost-of-living crisis hit and was a big undertaking.”
