Sorry for disappearing after my long post; reality intervened. When I said that most of the graduate level science jobs in our very small industrial estate are filled by East Europeans, that's true, and there are also quite a few East Europeans (but not a majority) working for our biggest local employer, which is in the food business.
The comprehensive (there's only one) went from Outstanding to Special Measures inside 12 months, and of DS's friends' AS maths class, not one passed in 2015. In the same year, A2 leavers achieving AAB or higher in at least 2 facilitating subjects stood at 11%, against a national average of 14.7%. It's average on the normal measures of deprivation and SEN. After GCSE 95% stayed in education, but 30% went to FE colleges. I think only one went to an independent school (sports scholarship IIRC). Post A level, quite a few went off to newer universities and to art school, but very few to RG universities; none to Oxbridge.
This could be an unrepresentative year but it reflects the local population (and chimes with my knowledge of the demographics). Does it suggest a school that encourages students to aim high? Not really, and this was a factor cited among OFSTED scoring it as a 4. Unless someone, either parent or student, is really driven then the results will remain mediocre. It saddens me, yet no one else seems bothered. I suspect that this pattern is repeated ad infinitum across England, outside the south east.