Martin Lewis warns UK households against biggest 'financial sin'

Martin Lewis warned households that loyalty could cost them (Image: ITV) Martin Lewis, the Money Saving Expert, has issued a stern warning against being overly loyal to companies you deal with, from banking to utilities. On his BBC podcast this week, Martin tackled some common financial disputes between couples, such as which credit card to pay off first and how to manage luxury spending. However, one recurring question led him to reveal what he considers one of the biggest "financial sins".

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Log('[Load] OVP flagTcfLoaded',new Date())}else{document.addEventListener("tcfLoaded",()=>{loadOvpScript()ExpressApp.Log('[Load] OVP tcfLoaded',new Date())})}},1500)}) While offering advice to those experiencing financial disagreements within their relationships, guest Gethin Jones noticed a common thread among the queries.

He noted that several couples were debating whether they should remain loyal to certain banks or utility provid.