I applied online. The process took 2 months. I interviewed at Business Data Partners (Edinburgh, Scotland) in Mar 2019
Interview
Series of phone interview, online tests, skype interview then finally assessment day. Assessment day consists of brief of company, 3 minute pre-prepared presentation, group exercise, interview with two staff members and another 40 minute maths/logic test
Interview questions [1]
Question 1
They had a set list of questions ranging from "if you could be an animal..." to experience/competency questions