Can't stress enough how much I discourage you from engaging in any kind of interview with Edison... My interview process took around 3-4 months, I had endless interviews and was even invited to meet the Head of UK Research. After stressing time and time again that they were interested in me as a candidate and wanted to try and get me to cover the sector that is most suited to my experience, I get an email saying that they really liked me but I'm better off working in investment banking... After the time and energy that I put into their recruitment process (interviews, financial modelling test, production of a QuickTake report etc.), I replied asking for more detailed feedback and never heard back from them... Shocking experience if you ask me, I would never EVER interview for them again - especially considering the mediocre salary offered