The latest report looking at contextualisation efforts at entry to improve diversity in the most selective UK HE institutions::
https://www.suttontrust.com/research-paper/admissions-in-context/
Two Key Conclusions:
There is little evidence to suggest that leading universities that practice greater contextualisation see significantly higher dropout rates, lower degree completion rates, or lower degree class results, suggesting that there is no reason why students admitted via contextualised admissions processes cannot succeed at top universities.
Greater use of contextual admissions could result in a substantial increase in the numbers of low income students at the UK’s most selective universities. 85% of students at these universities are admitted onto courses with a requirement of ABB or above. If this were to be lowered by two grades, to BBC, then, each year, about 750 students previously eligible for free school meals with grades of BBB or BBC who do not currently attend a ST30 institution could potentially go, an increase of 50% on current numbers.