Millions of people could be losing money because of one simple mistake, Martin Lewis warns.

The Money Saving Expert told ITV's This Morning that this is the best time for people to get the most out of their money.

He said: "Millions across the nation have money sitting in high street savings accounts earning diddly-squat, often at 0.1% or less, and are scared to move it as they want safety.

"If that's you...stop it.

"There’s currently a way you can earn over ten times that amount and it’s 100% safe."

He told This Morning hosts Ruth Langsford and Eamonn Holmes how to increase your interest rate in a matter of minutes, the MEN reports.

Martin said: "Sadly, it's another dire year for savers.

"Following the Bank of England base rate cut a few months ago to 0.1% - the lowest in 325 year history – and as it wants people to spend more to spur on the economy, savings rates have continuously plummeted, and things don’t look set to improve.

"Yet also many people leave their savings with their own bank, or just sitting in old accounts; if that’s you, you’ll almost certainly earn nowt.

"To get a half-decent return you need to become an active, disloyal, aggressive saver, shifting from best rate to best rate. So, check what your savings pay.

"Anything earning less than the top 1.16% easy-access rate needs moving. Don't dally - every day is lost interest."

You can read his full bulletin here.