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I assume a lot of people driving down roads with bus lanes are fairly local, making familiar journeys and not sliding satnav so that wouldn't make much difference.
In any case the signs are clear if you look but outside operation hours many bus lanes have permitted parking so pulling into one almost inevitably means having to pull back out a few hundred yards down the road and it quickly becomes easier to sit in the regular lane.
I know in my driving lessons I would be told off by my instructor if I didn't use a bus lane when I could, I don't recall what happened in my test but Wood Green B was sufficiently rubbish it got shut down.
One of the main interesting things about bus lanes has always been that most drivers aren't really aware of the hours of operation, and so stick to the adjacent general traffic lane even out of hours. It's odd especially in view of the satnav boom, as you'd expect that kind of software to be programmed to tell people when they can drive in bus lanes. If drivers were aware, you'd obviously get less of that occasional aggressive driving.