Exact figure: 4.86833, calculated from BARB figures for week ending 13 January 2008 and all subsequent weeks until 17 February 2008 which can be found here "BARB". Archived from the original on 15 December 2005. Retrieved 17 December 2014.
Exact figure: 4.86833, calculated from BARB figures for week ending 13 January 2008 and all subsequent weeks until 17 February 2008 which can be found here "BARB". Archived from the original on 15 December 2005. Retrieved 17 December 2014.