These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Les Yay: Just what is going on between Matron and Camilla Fritton? They do seem to be very close. It's Matron's hand that Camilla clings to when she's upset at Mr. Darcy's funeral. Matron is also seen walking along arm-in-arm with Miss Cleaver, the sports teacher.
There seems to be some of this between Miss Dickinson and Chelsea Harper during the scene where Miss Dickinson discovers the girls have been cheating at School Challenge. She tells Chelsea that she's been watching her with her feminine wiles and her "saucy ways", and reassures her that being smart is "very, very sexy". It does seem a little like she's attracted to Chelsea.
In one of the deleted scenes, Chelsea offers to try seducing the Cheltenham Ladies' College team in the School Challenge final; and when one of the other Posh Totties points out that "Cheltenham is a ladies' college, Chelsea!", her response is a shrug and declaring, "I don't mind giving it a try".