Hello, AFAIK the usual route to becoming a lecturer is to do your PhD, then do a couple of Post-doc jobs and aim to publish as much as you can! You usually need a good publication record to be considered for a junior lecturer/lecturer position. Meanwhile, any teaching experience you can get will stand you in good stead. I'm not aware of any particular qualification required for teaching but most Unis will run internal teaching courses for new or less experienced lecturers.