Sharing my experience for others
Application - Numerical
Phone Interview - Why Barclays, Why operations, what does operations do, when have you had to work with massive amounts of data and spot errors, whats an ethical decision you had to make, when have you worked in a team, when have you challenged a process etc
Format - Two Competency Interviews, standard questions where they run through an entire booklet in rapid fire, so they need to get through them quickly. Ranges from Commercial awareness, teamworking, leadership, what drives/inspires you, where you see yourself in 5 years, how you tackle the impossible, how you have demonstrated leadership or what others admire about you
Group Exercise - Very strange, building a rubix cube, you cannot prepare for this
E-Tray - Prioritisation exercise, new emails and IMs, events keep popping up and you need to choose your top 5. Think about time differences, manner of communication, scale of things affected, and keep monitoring all the way until time is up. Keep good notes to present to assessor as they will challenge you but you have to stay strong.
Awkward assessors lunch, try to be nice and interesting. Very well run assessment with extremely enthusiastic assessors who are very convincing about the future of Barclays