An associate of Anjem Choudary's, Abdul Hakeem, has said that imprisoning Choudary will not prevent his message from being distributed, and may in fact strengthen the hate preacher in the eyes of his followers.
Speaking to ITV News' Security Editor Rohit Kachroo, he said: "The only issue is, who's going to fill his shoes?"
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They plotted to gain a £300,000 insurance pay-out.
Philip was uninjured in a crash on a stretch of the A149 near the Queen’s Sandringham Estate in Norfolk.
In this episode, ITV News Royal Editor Chris Ship and Royal Producer Lizzie Robinson are joined by the Daily Mirror's Russell Myers.