Martin Lewis has issued a new list of ‘need-to-knows’ offering invaluable advice for most households across the country during the coronavirus pandemic. “We are amid a health earthquake, yet the worry is we will see a possibly even more devastating financial aftershock,” the money-saving expert wrote in the latest edition of his weekly newsletter.His sombre mood continued: “With rapid economic decline, and unemployment levels likely to rise maybe even higher than in the early '80s, there are huge challenges for individuals and society.” In this week's newsletter, the founder of MoneySavingExpert.com offers guidance on the “bizarre” Self-Employment Income Support Scheme (SEISS) rule, how no-fee credit card balance transfers are disappearing.