You'd be hard pressed to find a bus conductor nowadays, apart from an 'old time' event such as this. Growing up, I'd often see the conductor on the open rear platform as the bus was in motion. Of course, no passengers were allowed to be there, but back in the day they did - at their own risk!
Just been to our local museum, and there's a claim that the first female bus conductor in Britain not only did so in my home town of Woking, but on a bus that went into the centre of town from my own neighbourhood. That was in 1912, and I suspect it was a very rare job for a woman, but it would be difficult to prove that Milly Mills, then just 14 or 15, was indeed the first.