(22 Nov 2021, 12:21 am)N391OTY wrote Newcastle service 33 requires 2 vehicles so 5509/10(?) could go on there, with 5504 as spare for 33/X66, Are these newcomers Euro 6 ?

Dan stated on Flickr, they will be used as spare for gateshead services, 29, 49/A, 67/69, X66 however maybe used on other routes until CAZ is introduced