Things cyclists should know … POV driver who's incapable of cycling

High viz, (much like helmets) is a red herring when it comes to safety and just another stick to beat cyclists with.

If you want to wear either then that's fine but it shouldn't be necessary to of drivers are following the highway code. This is covered in rule 126:

At night, your stopping distance is thus defined by the range of your headlights. i.e if your headlight beam is 50 metres, you shouldn't be travelling over approximately 48mph.

I think that is so true and it does worry me that we might end up with the contributory negligence thing...yes the driver was dangerous/ on the phone/ pissed but you didnt have hi viz on so its sort of your fault.
I was in Belgium the other week and no one was wearing hi viz or helmets and there were lots of bike about.