Martin Lewis’ website claims that UK households can slash thousands from an important bill. A tip shared by the consumer champion’s site saw one family get almost £20,000 refunded – and they were oblivious they’d been missing out on a ‘little-known’ discount before bagging the cash.

Paul, a reader of the MoneySavingExpert (MSE) newsletter, discovered he was entitled to a council tax reduction. After reading MSE’s guidance, he’d learned about the discounts available for those with severe…