A few years ago, Jet2 worked on recommendations, an interview with a couple of pilots, including the CP and with the head of HR. A simple verbal reasoning and maths test, and it seemed to work pretty well. The guys on the line (bar the crazy contractors) were good.
Today's recruitment process in overly long and protracted. There are countless numbers of HR people invloved. Jet2 is an organization which prides itself on low-cost in all it does; lots of HR doesn't seem to me to fit into that at all. It seems empire building is well under way. This is the same HR dept which has a odd interpretation of employment law when it comes to closing bases.
I know of several TR F/Os who have passed the assessment, but heard nothing. I know of a few who went through the same process last year, passed, and had to go through it all over again.