I was invited for a face to face interview on February 2020. I was very keen to work for that company but was disappointed by the behaviour of the interviewers. The job title is confusing and they weren't sure about whether they were looking for an analyst or an engineer. I also believe that they would not hire someone who is not UK national for security reasons, however they will not say that explicitly when they post a job. The company also failed to provide an update about the status of my application. I had to send e-mail over e-mail and call multiple times to get some feedback which did not help me understand what was wrong with the interview and what I have to improve before re-applying in the future.