I applied online. The process took 3 months. I interviewed at OC&C Strategy Consultants (London, England) in Jan 2020
Interview
CV, cover letter, online assessment,
If pass both, then would invite to interviews.
super day consisting both round.
Round one in morning with two associate interviews,
lunch break with an associate to ask any questions you have. Afternoon is round two - interviews with partners if you pass the morning ones.