(30 Nov 2016, 8:23 pm)South Tyne Lad wrote No bus will be used to that type of route, The X9/X10 is one of the most unique routes in the country.

Having Coaches reduces the capacity per hour that can be carried, As its illegal for standees in a coach, Which is a major push for the likes of Peak time journeys out of Newcastle or all day Saturdays etc,  Unless a Oxford Tube style high frecuency service is provided.

This then draws it back to Double Deckers, While everyone ( including management ) should know the Streetdeck couldn't cope when it was on trial due to it being limited to 50mph, Adding also the fact that its hairdryer wouldn't last long running constantly at high revs with a 4 speed gearbox.

The B9TL's ( if kept in good condition ) are stars, 4 and half years pounding a route like that is getting your moneys worth out of them, They aren't exactly dead yet, They'll work for a good few more years yet as spares for less demanding services.

Like I said above, Having coaches would possibly need a higher frequency service to fit everyone with spare capacity, While less Double Deckers will take the same load with still standees remaining to be taken.
That's why I suggested the Scania E400, As its nearly on par with the B9TL, So you can expect atleast another 4 and a half years out of them too, No point going for the Streetdeck as that'll only last 2 years maximum before turning into Arriva's VDL Gemini's/

Then in 2021 when they need replacing, There'll be Euro 7 Deckers with Corsa engines in them as there considered powerful enough.... ( joking, But I woudnt be surprised if it happens anyways )