Although this is old I'm going to offer my understanding
The taxi driver will no longer be allowed to be a taxi driver for that council that issued his permit but he will just register across the next local council and still be able to operate.
He would have been given a warning or caution only by the police regarding the assault - had the HGV driver been non white then it would have been taken further
As for his atrocious driving there is no excuse but if he was taken to court his solicitor would ensure the judge knows about his bad family life, current situation, all those many hours working to pay for his daughter/his bit on the side/the local prostitutes drug habit
Such is our wonderful country - no respect and no justice
Aggressive prick.