Tonight’s Channel 4 News will be extended to an hour following the resignation of David Cameron’s director of communications Andy Coulson and Tony Blair’s appearance at the Iraq Inquiry.

Coulson resigned over continued coverage of phone-hacking that took place under his editorship of the News of the World.

Presenter Krishnan Guru-Murthy announced the extended bulletin on Twitter, following a previous comment that there was to be “an unusually exciting Friday night’s channel 4 news ahead”.

Meanwhile, following Coulson’s resignation, Guru-Murthy’s co-presenter Jon Snow alleged that he believes his own phone was hacked with the involvement of another, unamed, newspaper.