James Murdoch has begun giving evidence to the Leveson Inquiry into press standards later, to be followed by his father, Rupert, on Wednesday.

The inquiry is moving into a new phase, focusing on the relationship between the press and politicians.

But both men can expect further questions about phone hacking at the now-defunct News Of The World (NOTW), as well as questions about their dealings with senior political figures.

James Murdoch, who is appearing at the Royal Courts of Justice, is only the second witness - after the information commissioner, Richard Thomas - to have a full day set aside for his testimony.

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