(24 Jan 2022, 6:21 pm)peter wrote Yeah I've also heard that unlike GNE and Stagecoach, Arriva have just chosen to retrofit everything. As mentioned above the only exceptions are the B7 Gemini's and some of the Solo's which shouldn't be too difficult to sort out given rumours of cascades.
A lot of Jesmond's fleet have been Euro 6 standard for a while.