You can spot a car when the driver is texting. Rather than pootle along with the car in front, they leave a gap, then, when they look up and see it, finally jerk forwards, before repeating the manoeuvre one SMS interval later.
Here you can see HD06NZY doing precisely this in the oncoming lane, a queue on Cotham Road to get to the roundabout which is blocked by school parents.
It being school run time, our expendable reporter opted to turn round and ask them to stop it. As you can see, they're a school running parent themselves. Presumably one of those parents who thinks it is too dangerous for their kid to ever walk or cycle to school -so instead they drive. And as anyone who ever has to do that school run by car in Bristol will know: its not fun. It's slow and boring. Hence the need to do something other than talk to a small child in the back.
The mum doesn't seem too happy about the other school parent telling her off. It's bad enough having to sit in a traffic jam without having some sanctimonious tax-dodger complaining that they are endangering all children trying to walk or cycle to school. People like that should,
If those parents who let their children walk or cycle to school really loved their children, they'd drive them to school. It's too dangerous to do anything else!