Warnock would have appointed Redknapp ahead of Roy Hodgson.
"I do think we'd have qualified for the World Cup by now if Harry was in charge but I'm biased," he told talkSPORT.
"Roy is a very good manager and a lovely person but I just think he fitted as someone safe and secure. He wasn't a gamble and that's why I very rarely enjoy watching England. Harry gives players more freedom and flair. Roy always sets his teams out not to lose."
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