Namechanged. I have two kids at the school (have both been there since nursery age at the pre-prep) and eldest is now in the sixth form. We've found it to be a brilliant school in every way - my children are very happy and the teaching has been incredible.
The allegations surrounding 'sexual abuse/bullying' isn't our experience of the school AT ALL. I don't mean to minimise anyone's traumatic experience whatsoever, but the majority of what was being claimed was with regards to teen boys behaviour at out of school parties (which is, to an extent, beyond the school's control). Equally, it is always important for young women to stand up and be heard - but as far as the 'everyone's invited' allegations were concerned, there were some overarching questions surrounding the validity of some of the claims. Despite that, the school took this all very seriously indeed and conducted a thorough investigation - @Heather37231 mentions the report.
Obviously, teenagers can have bad experiences anywhere and the last thing I want to do is minimise, however - in terms of my (and many families I know well) many years at the school, I just don't recognise it. Children are taught an enormous amount about sexual consent and respectful relationships from a young age, and from what I've seen with the teenagers I know at the school (including my own), this is reflected in their behaviour.
The one thing I would pinpoint in your question is the question of wealth. The school does its best to be grounded and it's definitely not just full of uber-rich families (though there are a lot of them) - there are many of kids on bursaries. However, it is an expensive school, and with the labour fees on VAT thing - it will continue to become even more expensive over time. I do think within several years, private schools like this will become the preserve of the super wealthy, and that will change the environment for the worse, unfortunately.