(14 May 2018, 3:11 pm)G-CPTN wrote Last Friday I travelled on two Arriva the Shires 17 reg Alexander Dennis Enviro 400MMC buses - which 'cut-out' immediately at every stop - restarting again to drive off of course - which seemed to be placing unnecessary additional stress on the starter motor - I wonder how long they will last?

I meant to reply to this when you posted.
The original hybrids on the 21 (now on the 1) are like this.
From a passenger perspective, I didnt enjoy riding them at all.

The replacements seem slightly different. 
On my first ride, the engine didnt cut out at all.
On a subsequent one, the engine cut out on occassions.
Keeping an eagle eye and ear out since, I'm wondering if there is some sort of 'over-ride' function.
The ride is a lot more pleasant when it doesn't cut out.