(09 Aug 2015, 10:34 am)Jimmi wrote Think it could have given the number 59 to fit in with the Scarlet Band 58 which the 59 follows much of that route and also the Arriva 56/57/57A routes. Also may be wrong but I think there already was a 259 East Durham service at the time, if not there certainly was a 259 at one point.
Yep. The 57/57A used to cover the route through Thornley, cquarrinton hill etc that the 58 & 59 do now, hence the similar numbering