You know what is really sad here? It's extremism.
By all means, let's work on outreach programs and partnerships, etc, etc. I know a lot of top tier PS (in London at least, first hand experience) make a lot of efforts to support state schools. But an outright ban for PS kids?
You make quotas for uni admissions for PS students - well, a lot of most the desirable employers now run uni blind assessments for grads. Surprise surprise, it led to a much higher proportion of PS grads getting the jobs. I remember a thread here a couple of years ago when some poster had DS with contextual to Oxbridge and was fuming at uni blind recruitment.
At present Labour are doing all they can to give Reform majority in 2029. It doesn't require two brain cells to see that DEI targets, incl socio-economic background, will be the first ones to go. Remember Trump in Feb? Unfortunately we will be there in four years.