So on a bus again tonight at layover at Park Lane. Driver has reved the bus and is now standing outside of bus on his phone.

Now a tone has sounded whilst on his phone he has moved his phone away from his ear and reved the engine. And by the time I finished typing this post it's gone off again!

What's the point of euro 6 leaves painted on the bus if they do this!? If its a reliability issue then it should be sorted on warranty or at depot.