Great Western Railway interview questions

Overall the interview process was enjoyable and majority of the people were very kind. However, one person who was aiming to get the role and already worked there in another role was very unpleasant and somewhat ruined the experience. This person pointed me to the wrong room whilst waiting for interviews to start, and it was only when another interviewee told the interviewers that they saw someone in that room that I was there, meaning I could have completely lost my opportunity due to this person. Throughout the rest of the interview process this person was very belittling to the other interviewees and rude to all of us, making me confused how he was employed by GWR. Besides that, the interview day was very enjoyable, the other people were lovely, and I would have loved to work there.