Not sure how many DCs in the threads apply for Highgate.
We have a very nice experience on Highgate's assessment day last Wednesday. A brief visit follow by group interview team work exercise and 2 different subjects taster class/exercise. DD enjoyed it all the way. She found it very inspiring when hearing other children answer the group interview questions. And a lot of interactive opportunities.
The school facility is the best among all the schools (all North of the river) we visited so far. The teacher team is young and enthusiastic. A good diversity in the class.
The process is well organised, lots of help video on school website to cover first round assessment. It is the only school asked for applicants availability before sending out second round dates.
Based on the assessment format, think the school is looking for DCs that work well in a team, naturally bright but give little pressure on academic front (no set , not time pressure exams).
The school has become Coed for many years. However, somehow I still have the impression Highgate has the public school "alpha/beta" male culture. This probably is my biased view as all the Old Cholmeleians I know at my age is male.
The school itself definitely become more popular year after year.