Martin Lewis shares 'urgent' warning to every homeowner in England. (PA) Martin Lewis has issued an urgent warning to homeowners across England regarding their mortgages. The cash-saving guru has warned mortgage payers that they will need to act soon if they want to save money on their repayments. The Money Saving Expert founder is known for dishing out financial advice to Brits with advice on banking, taxes and the best deals for consumers. Mr Lewis is also a regular figure on ITV’S This Morning as well as presenting his own shows Extreme Savers and The Martin Lewis Money Show.