"I understand that no two days as a work coach are alike, and that you'll encounter and experience all sorts of differing situations and varying customers. But taking that for granted, could you describe to me what a typical day on the job looks like, from meetings to filing reports, to anything not specifically advertised in the job description?"

As you research the civil service, the DWP, former employee reviews, and any other relevant information you can find online, you will be sure to come up with some questions. However, take every measure to answer those questions yourself before your interview. Those questions you were unable to answer, despite your best efforts, are the ones to ask. The greater the breadth of your research, the greater your work ethic will shine through. An important detail to remember for a job that is awarded on merit.