Ok so..

Yes it was completely competency based - there must have been at least 25 questions. Most of which were based on what I could bring to the role & department, how i would handle stepping into the managers shoes when he's out of office, how I would improve the department, employee morale, what immediate changes would I make it etc. Not the "tell us about a time when you almost headbutted a colleague..." type questions.

I don't feel I did myself justice, and that was because I was unable to do effective preparation.

I completely understand why candidates should know what the competencies are. It makes sense to provide the candidates you've invited to interview with information on what you're looking for, so we can come to you with our well planned & thought out ideas.

Otherwise you're shooting yourself in the fucking foot expecting us to pull ideas out of thin air on the spot.