Submit you CV online, cover letter is not required so don't waste time writing one. If you are successful, they will ask you to complete online testing, video interview via Vieple and then assessment centre. Below are the questions from the video interview I did, plus some from previous years.

Asked to fill out 2 written answers to questions and record a video answer to a question. You were able to take as long as you wanted on the questions as there was no time limit and the video could be recorded as many times as you needed before uploading.