Hi Chris, I did the tech interview in Sept 2012. It lasted 2 hours and was like a slide show with questions. They are not trying to catch you out and give you plenty of time to answer. Some of the terminology is different and I said this at the start and anytime I didn't quite understand the question I asked the Interviewer who is a qualified Mechanic also to clarify. The interview covers H&S, electrics, circuits, hydraulics etc. I was sick with nerves and got through it fine full marks! The result took 10 days but is sweet when you get it. Its natural to worry but all they want to know is that you know your trade and not chancing your arm. If you have any specific questions let me know and I'll try to help.