(30 Mar 2014, 5:14 pm)NEBCD Malarkey wrote 3964
Bought New to Chester le Street in 2006 - 21 24 Hours a Day
Was Branded Angel in 2006/07
Was Repainted for the TTX in 2009, and Transferred to Sunderland Road
Was Repainted Red Northern in August 2012 - Remained at Sunderland Road
Was Repainted Green for Festival of the North East in April/May 2013
Was Repainted Yellow in July 2013 for Real Radio
Was De-Branded and Remained Yellow for Children in Need in October/November 2013
Was Repainted Red in February 2014 for GNE Corporate Livery
Just what I gathered from a quick Flickr Search, I sure it started out on the 724 rather than the 21 though, but I would double check, also Double Check Dates also as they might not be Accurate.
There's a photo on my Flickr stream from the day it first came out in plain yellow, before the real radio vinyls were applied. Difference being the Go North East body logos were originally black.