The Bishop of Durham, the Rt Rev Justin Welby, will be the next Archbishop of Canterbury, Downing Street has confirmed.

The former oil industry executive becomes the 105th holder of the post, replacing Rowan Williams.

No 10 made the unusual move of announcing the appointment on social networking site Twitter stating: "Downing Street is pleased to announce the appointment of Justin Welby as the 105th Archbishop of Canterbury."

Rev Welby said being nominated for the post was "both astonishing and exciting" and a "privilege".