Home Office interview questions

It was a presentation which I was given during the interview and then only 20 mins to prepare explain and justify my decisions whilst expected to research some sites they have provided as well as my own. Just was not enough time to soak it all in and process it. It's not a true reflection of the job or role as usually when presenting cases at court you have an idea of what the case is even if a new curve ball is thrown. This was a different scenario. I understand they want to see how quickly can you understand and present something but 20 mins on a big question is not enough time.