I came across a web site [http://www.schoolscout.co.uk] that takes school performance league tables and after a brief query provides results on the relevant results.
I searched for coed independent and state day schools within 1 mile of my postcode with day fees under £1000 per term ordered by A levels. The A level results are presented in numeric format while the ranking can also be done by GCSE scores and distance to your location.
Luckily, all three schools that came up were state schools because while I asked for some tuition fee guided results, that really isn’t realistic.
I am impressed by how easy those results were to find and now must take a look at nurseries and playgroups [Ofsted inspection reports].