I applied online. The process took 2 weeks. I interviewed at FDM Group (Glasgow, Scotland) in Feb 2018
Interview
There is an initial phone screening, where they ask for some basic details and explain how the program works, this is very informal. Then they invite you do a pre-recorded video interview, where you answer 6 questions. You have 30 seconds to prepare for each, 90 seconds to answer, and you may only record your answer once.