The process starts with a dissemination test. You are given a dataset and asked to identify key features (insights) from the data and also create a plot from the dataset. After that, there will be a short break before the main interview starts, where you will talk about the data you were given and the insight you can see from the data. The interviewers will then ask you civil service questions

2 hour total interview. A dissemination task requiring you to present some insights based on a novel dataset, followed by more situational questions relating to work experience such as "Can you tell us about a time when you had to identify and obtain the most appropriate data to meet customer needs? This could be from academic or professional experience."

interview took over 2 hours - about 30 mins of prep time and the rest spent on a brief presentation and behavioural questions, they wanted very classical statistical experience, i.e. different regression analyses etc.