Flashing third brake light

[Connor]

our works van if you brake real hard in that the hazzards flash too with the brake lights on solid

Last i heard that was also illegal. Once again, an turn on option for Europe but most didnt have it switched off when imported into this country.
Not sure if it still is though as when looking at the spec of my new car, that was a safety feature on that.

The brake lights are crap i find especially on the insignia. They stay off for far to long in between flashes.

As far as I knew, that was legal, its when the abs kicks in, slot of newer cars do that