How long do you keep your pupils? For life it seems in my case. A message on my F/B

Hi I'm an ex pupil and I've got a question for sean. Hey sean  it's Christian thanks for everything you did for us really appreciate it. Due to my insurance wanting 5 grand a year because of my convictions I've put my licence away and got a motorbike for a cupple of years my question is where do I stand on filtering is it legal to do am I in the wrong if I'm filtering and some 1 pulls out on me I wear a helmet cam but I don't no if it's legal or not and I don't just want to follow suit thanks regards Christian

PS He had the points before I started teaching him.