A question, and perhaps one that will strike up some debate, but who really makes the call as to whether a bus is changed over?

Reason I ask is that I was on 8252 first thing this morning. Driver was on the radio as we passed through Barmston, as the bus was stuck in first gear. Control told him to reset it completely, which he'd pointed out he'd done already. Nevertheless, he did again. Same problem, so he pulled up at the depot (on route), and was fobbed off to try resetting for a 3rd time at Concord. That struck me as a bit odd, as surely you'd rather establish that it's not working, whilst outside of the depot? Anyway, 3rd reset and same issue. Then on the road out of Washington, the bus lost power all together, and had to pull over in the bus stop just off Follingsby roundabout. The driver thankfully flagged down a passing 4, and we were transferred on to that.

So should it be the drivers, controls, or engineerings call?