Tom 18 Jul 2015, 9:25 am #816 Tom Tom Tom Website Posts: 6138 Threads: 21 Joined: Aug 2012 Reputation: 0 RE: Arriva North East: Upcoming Service Changes (18 Jul 2015, 9:23 am)mb134 wrote Any reason for the change of service numbers? Probably to group them all together, so you'll have X7/X8/X9/X10/X11 instead of X4/X5/X10/X11/X13. Reply