Honestly, expect a month of wait from your initial application to receive the email saying youve passed the application stage, expect another week or two to receive stage 1 tests. Maybe a week to get the results for stage 1 and get invited to the interrupt, wait for another 2 weeks for an interrupt test session, then youre off to the assessment centre, which some of us wait months for, i think ive been waiting almost a month for it already lol