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"I've never hacked a phone, told anyone to hack a phone or published any stories based on the hacking of a phone."

The words of Piers Morgan could not be any clearer.

The former editor of the Daily Mirror and the News Of The World is now a high profile TV personality in America.

One former Daily Mirror reporter James Hipwell, who was jailed for illegal share trading, said Piers Morgan knew about phone hacking on the paper.

The World at One's Jon Manel explains what is being said.