Both interviews went extremely well, friendly and personable interviewers. The reason I am providing a negative rating is I never received any follow up or feedback despite being told by the recruiter they wished to move forwards and would provide dates to meet the team the following week (mid-Nov) which never happened. I followed up several times on a weekly basis, only to be told (by the recruiter) that further internal conversations were happen and nothing to update on. Eventually I gave up and have since secured another role. Sadly this doesn't reflect well on O2, as many people within my network know about my experience, and word of mouth travels.