I agree with GSM, I do not see why this move should affect any pupil in any social group unduly. The proportion of people going to university without those qualifications must be very small anyway and there are usually exceptions made for those with any disability that makes achieving such standards impossible
I think further education needs a good shake-up with more non-degree training that is flexible, so that it can be acquired in bite size chunks.
In the 1960s and into the 70s most professions had multiple channels of entry with starting points being at every exam level from O level onwards. It was only in the 1980s-90s that the every profession decided that entry should only be by university, which excluded anyone who could not follow the traditional school to 18, 3 A levels, university degree course.
Back in the 1960s I had a boyfriend, plus also my best friend from school, who had family crises at 16, which ended their education. At 18-20 both were able to start training to be a Chrtered Accountant and a solicitor, respectively based on their Olevels, with a small salary. My school friend ended her legal career as a judge, so her lack of formal education did not hinder her career progression. What is needed is a return to this sort of flexible career entry.