That's a great question, that is not properly reflected in previous posts.
We've been at the school for a while now, enough to see that it is very liberal in its ethos and environmentally activist. It is one of the few coeducational private schools in London, and the transgender community is made to feel welcome from the school's inclusive ethos.
This was a welcome surprise to us, given that previous posts had mentioned it was quite conservative, paternalistic, and orthodox. It might be that it was so in the past, but the current environment is a clean break from that.
It is not woke in the American sense, since the liberal values are in the end just a reflection of the student body and their parents, who are mostly white middle class professionals with liberal 21st century values. So it struggles in representing a wider multicultural environment. It is more WASP than woke from an American perspective. This is also reflected in the kids' educational and professional ambitions, which are very much about Oxbridge and then City careers.
In other ways, the school stays true to its legacy. Kids are expected to have Church attendance, especially around religious festivals (your kids will know what Michaelmas is, even if you don't particularly care for that). And sports are British heritage sports with associated gender segregation, such as Netball for girls. Uniform policy is not strict, there are never actions against socks or shoes or even sweaters, just a general comment about it.
Kids are fairly non-conformist. There is no typical Highgate kid. A liberal environment and a large student community will do that I suppose. There is such a wide choice of study, sports, music, and clubs that no two kids will experience it exactly alike.
It is a fairly nerdy school. Kids are bright and care about being perceived as such. And there is some associated pressure and anxiety related to doing well. Kids are devastated at having to go to Durham instead of Oxbridge, that is a bit of an inside joke with the students, but just goes to show that even second best for a Highgate kid is way up there. As such, it also means it's not very cliquey. Kids will relate around interests, not backgrounds. And they'll be way too busy with studies to have much time for that even, except in the context of sports and music.