(04 Feb 2021, 8:49 pm)AIG20 wrote If no new vehicles are ordered and delivered before the CAZ comes into effect, vehicles will probably be swapped around instead. Apparently, Sunderland ADL E300s 27726-40 are now Euro 6 so these could be swapped with MAN ALX300s.
I thought some of they were upgraded to Euro 6 with the rest following later.