I applied through a recruiter. I interviewed at BT Group (London, England) in Dec 2015
Interview
Very long. Maths test online, then HR interview F2F, then assessment centre for 5 hours and 2 final interviews with Directors/MD. The assessment centre was to review my project/programme management skills.
Interview questions [1]
Question 1
How to manage stakeholders, create a project plan, close a project, ...