If you have online access to the Times you can sort the schools by A level A star only, or A star A, or just focus on GCSEs (9/8/7). They have GCSE 9/8 in the details for each school, but annoyingly not one the summary table, as that would be interesting too.
The top 3 (SPGS, SPS and KCS) remain in the top 5 on all criteria except GCSE, and in the top 6 (KCS) at GCSE. I really don’t think, as suggested, that the sole reason Kings do so well is the inclusion of girls in 6th Form.
I also had a look at the top 10 in 2019; 6 of the 10 are still there - so at the very top there is not actually much movement year to year.
I have very good experience of one of the top 10 schools, and while there is some movement after GCSEs, it’s almost entirely personal choice by the pupils, and not a weeding out by the school.
Whichever criterion you use, there is some bunching - there are 8 schools whose A star percentage is between 59.1 and 63.1, for example. So there is a bit of randomness to the exact order, and anyone using the tables sensibly would know that.
One interesting observation: Percentage A stars are way up. SPGS had 52% in 2019 and was one of only 3 schools with a percentage greater than 50. This year SPGS has 75% (!) A star, and 29 schools had a percentage above 50. Suggests the marks were rather closer to the teacher assessed grades than the pre-Covid levels.
The other point of interest is the fall in rankings of the top boarding schools - not just Eton, but Wycombe Abbey and Winchester too. Perhaps more an indication of societal change and attitudes towards boarding than anything else?