Such a portfolio might include BP , yielding 9pc with 2.6 times dividend cover ; GlaxoSmithKline , yielding 5.5pc with 1.6 times cover ; National Grid , yielding 6.5pc with 2 times cover ; Scottish & Southern , yielding 5.7pc ( 1.7 ) ; Shell , yielding 4.2pc ( 3.5 ) ; Vodafone , yielding 6pc ( 1.8 ) plus the FTSE iShare yielding 5.1pc with no cover calculation available .