Our local, Ofsted outstanding, 6th form college in very middle class leafy SE suburb (where average house prices are £600k upwards and most within a mile are £1m+) is on the list for contextual offers from some RG universities, based on the fact that there is one council estate on the edge of their catchment
individual universities set their own criteria for contextual offers and usually draw from a wide range of data and school attended is just one of the factors. These include:
Individual factors ( are they underrepresented in HE/that institution)
Area Data: This may include the Participation of Local Areas measure (POLAR), Index of Multiple Deprivation. POLAR data is is used to estimate participation in higher education based on postcode.
School data: This may cover whether the applicant attended a school with relatively low average attainment at Key Stage 4, or in a deprived area.
Intersectional data: Data which takes into account more than one measure of deprivation, such as UCAS’s multiple equality measure (MEM).
Participation in outreach activities or programmes
Individual pupils at this school may get contextualised offer because they are first in their family to attend university and they live in a postcode with low participation.
Alternatively this school may have a partnership agreement with certain universities which means favourable admissions criteria- for example, a guaranteed interview if you meet the entry requirements. This is different to contextual offers.