I applied online. The process took 3 weeks. I interviewed at Three (Dublin, Dublin) in Dec 2015
Interview
Invited for an interview with a days notice, with this in mind I was told it would be just a chat. The questions were quite intense and required a lot of background information.
Was invited to a second interview which was the final round. There was an online assessment to be completed beforehand. For the interview I was asked to prepare a 15 minute presentation regarding the industry. One of the interviewers didn't make the interview.
Unfortunately there was no offer, however when I emailed an Out of Office for a 2 week period. After following up again I still received no feedback.
I applied online. The process took 1 week. I interviewed at Three (Maidenhead, England) in Jan 2016
Interview
Very good, lots of great questions ask. Would like to work here if given the chance. Very nice office in maidenhead. The interview last over 2 hours, and had to take a test as well.