In his sentencing remarks, Judge Mr Justice Saunders said Andy Coulson clearly thought it was necessary to use phone hacking to maintain the newspaper's "competitive edge".
And he said the delay in the News of the World telling police about the Milly Dowler voicemail in 2002 showed the motivation was to "take credit for finding her" and sell the maximum number of newspapers.
The judge said: "Mr Coulson has to take the major share of the blame of phone hacking at the NotW. He knew about it, he encouraged it when he should have stopped it."
The former No. 10 adviser has been jailed for 18 months after being found guilty of plotting to hack phones while at the News of the World.
Andy Coulson is a strong, stoical and dignified character and these qualities will help him survive well in prison, Jonathan Aitken writes.