Martin Lewis, the founder of MoneySavingExpert.com (MSE), has encouraged Britons to capitalise on high-interest savings accounts and warned against keeping money in accounts that offer less than four percent interest.

In recent months, Martin has been urging people to seize the opportunity of higher savings rates before they potentially start to decline. In a recent MSE newsletter, he revealed that some individuals express “reticence” about switching providers to secure a better savings rate,…