I applied online. The process took 4 weeks. I interviewed at BT Group (Hertford, England) in Nov 2018
Interview
The interview was during an Assessment day. Lasted 30 minutes. The Interviewer had preset questions and only asked them. Other tasks during the day included a scheduling task where you have to arrange a meeting while looking at attendees calendars, a task where you compare bits of data and a task where you read a book on how to fly a plane and then have to teach an assessor how to fly a plane. This final task was difficult and wasn't helped by being explained poorly.
Interview questions [1]
Question 1
Do you prefer to implement new methods or keep things as they are? And why?