(08 Feb 2015, 6:41 pm)Dan wrote Yes, you're right.
Prior to October 2012, services 15/15A were operated by single decker vehicles and there was an extra weekday journey (numbered 815) in each direction on the morning school run, operated by a Volvo Olympian. As part of a consultation held in August 2012, Go North East decided to withdraw this extra weekday journey completely and replace the single decker vehicles with double decker vehicles to provide the extra capacity when it's needed at peak times.
There is an extra 15 journey on school day mornings from Consett to Durham running 5 minutes in front of another 15. I've seen all sorts appear on this journey over the years usually a President or Volvo Olympian although I've also seen Venture Solo SR's and SPDs a good few times before.
Apparently these 15's are pretty busy on a morning as someone on my course used to get it from Consett.