254 LISTEN TO YOUR WISER SELF! Whenever you get that spending itch, listen to your wiser self. "Do you really need that?" she asks. "Wouldn't it be better to wait till there's more choice in the shops and keep on buying National Savings Certificates?" Every 15/- Certificate earns you 5/6 in 10 years' time. BECAUSE This increase is not subject to Income Tax. They're easy to buy, easy to hold, easy to cash. Savings up keeps prices down. NATIONAL SAVINGS CERTIFICATES ISSUED BY THE NATIONAL SAVINGS COMMITTEE.