Vocational licenses for private hire drivers

I read that there were 30,000 private hire drivers who have not obtained their licence and the compliance date is due soon.

The reasons for their failure are mainly attributed to:

a) Language difficulty
b) Need to attend classes and pass examinations.
c) Insufficient places for classes and examinations.

Will the deadline be delayed? If not, will these drivers be barred from driving?

Are we trying to get them to pass examinations that are not relevant to their work?