The buses are part funded under round three of the government’s Green Bus Fund which is aimed at reducing fuel emission levels by encouraging bus operators and local councils to use more eco-friendly vehicles.
For the record details of all thirteen vehicles are as follows:-
606 WX62HFU 607 AU62DWN 608 AU62DWL 609 AU62DWG 610 AU62DWC
611 AU13FBJ 612 AU13FBK 613 AU13FBL
Many thanks to Zak Nelson for identifying the last two vehicles