(06 Apr 2014, 3:23 pm)Jimmi wrote These are the EcoCitys I've seen this afternoon.

5A/X66: 4810, 4802, 4804, (2869 must of replaced 4805.)
21: 4805 & 4807

Not 100% certain yet, but it appears on Sundays, Darlington work in the same way as Stockton (on Middlesbrough runs) with the driver keeping the same bus for their entire shift (4807 was on 2s this morning and likely that 4805 did the 4 hours on 5a/X66 then after the driver's break, went onto the 21).