(05 Aug 2014, 5:31 pm)Tom wrote Just thinking - if there are additional peak time runs on the X21, could the service be operated by Citaros?
I think the X21 would be better served by a double deck vehicle based on the North bound loadings from Chester le Street between 09.28 and 11.28.
Edit: The link below shows a typical weekday loading for the X21 mid morning.
https://www.flickr.com/photos/gpr_bus_ph...9589969513
There will be even more passengers on the same journey on a Saturday.