@Bluerose2020 I would say most people do some form of tutoring- be it with a tutor, the parent spending 1-1 time with the child with past papers, atom, bond, etc or signing up to group tuition. Prep schools vary in the way they prepare; some do lots of exam prep whilst others don’t alter the curriculum at all for the 11+ and a whole range in between.
It doesn’t necessarily means that people will continue tutoring in senior school but I wouldn’t know for certain.