my internet was down all week, so just want to clarify what happened with the yellow box. The yellow box was in front of traffic lights and was quite long, so unfortunately I was paying more attention to the lights that I was approaching than the road markings. This meant I was already preparing to stop for the lights when I saw the yellow box, and so was able to come to a halt safely without slamming on the brakes, and with only the front wheels on the box. I think this was why my instructor didnt brake for me, as by the time he realised I wasnt stopping in front of the box I had stopped anyway (if that makes sense!). I really wouldnt fault the instructor in this case.
It was also a really long box, which meant I was absolutely not blocking anyone from turning or anything like that. I could understand someone being annoyed if I had blocked them, or slammed on the brakes in front of them, but that didnt happen in this case.
I know it doesnt make it right, but the number of people I see driving quite deliberately into yellow boxes is amazing. And doing all sorts of other mad things. And yes, I know, pot and kettle and all that, I'm not a perfect driver either...
I just heard that a friend had someone get out of their car and come up to her car with an axe because she was waiting at a junction to turn right. There must be some seriously stressed people out there!
Thanks, all, for the comments, and might look in to that driving course that was mentioned.