@MusicallyMad, you have been misinformed, on a number of fronts.
“I have been told that the class sizes at Falkner House are nearly double that of Wetherby Notting Hill or Wetherby Kensington. I telephoned the schools and whilst Wetherby told me their class sizes ranged from 18 to 22 boys, Falkner House School said “it varies” and wouldn’t give an exact amount!”
To even, initially, type these words, did you, honestly, think that the class sizes at Falkner House would be anywhere from 36 to 44 boys?! About a third of the total number of boys in the entire school!
“Also meant to say the class sizes can’t be double because this would mean over 30 in a class and I think that is the legal limit, or does this not apply to private schools?”
In England and Wales, there is no statutory limit on the size of any class above Key Stage One. Local authorities, governing bodies and academy trusts are subject to a statutory duty to limit the size of infant classes for KS1 children, taught by a single qualified teacher, to 30, or below; see the School Admissions Code (www.gov.uk/government/publications/school-admissions-code--2).
It goes without saying that a school of Falkner House’s calibre, who operate a one-form entry policy, across the boys’ and girls’ schools, would not deviate from this.
“I’ve just been told in a private message that the year 2 at Falkner is 28 boys. In one class!”
Such utter nonsense. As the parent of one of the boys in this class, there are, currently, 24 boys in the class, and a number of the boys will be leaving, for September 2021 entry, at 7+, at some of the top boys’/co-ed schools, in the UK.
Not alone are there 24, and not 28, boys in the single Year 2 class at Falkner House, there are two Year 2 teachers - the boys are taught by two teachers, who are, ably, supported by Teaching Assistants. It works like an absolute dream. In effect, the teacher:pupil ratio is, just, 1:12, and much less, when the boys are being taught in sets. Furthermore, the boys have separate, and wonderful, teachers in science, art, music, PE, etc.
It really is the best of both worlds: the boys have a great circle of friends, whilst enjoying being taught in small groups. The teachers provide challenging, entertaining and informative lessons, in a nurturing environment.
The school were correct in saying that the class sizes vary - they really do, and I am sure that they would have been happy to elaborate further, had you asked them to. Instead of relying on hearsay, you should contact them, again, and take a look at the staff list, on their website.
I hope that this helps. Best of luck with your research, the assessments and decision-making!