I applied for this role in O2 in Slough online and received an email and call within a few days for a phone interview with HR. After going back and forth a few times, managed to get a phone interview which was covered brief background, some behavioral questions and an outline of technical requirements for the job. Clearly the HR person had no idea about the details of the role (most HR folks don't in my experience), but I got through the first round and was invited for a face to face interview. The face to face interview was frustrating. The hiring managers were looking for skills that weren't outlined in the role advertised. They clearly had a massive list of typed out bog standard questions and were in quite a rush to cover them all, without giving me the chance to think through them before answering. Due to the pressure, I stumbled over one question and felt backed away in a corner and put in a tight spot with no help or apology from the hiring managers. Overall, it felt like an ambush and I was so frustrated that I ended up withdrawing my application and regretting wasting my time with them.