Millions of savers with NS&I have been dealt a blow after it announced it would slash interest rates in November and cut the Premium Bonds prize fund a month later. Savers with NS&I’s popular direct saver account will receive a cut in rates from 1% to just 0.15%, while the return on income bonds – which had been best buys – will plummet from 1.15% to 0.01%. The government-backed...