What do the backup team do?
It depends really on what job you're on. If you're only going out to meet a single person or maybe two people, generally no. But if it's a gang element, or a big story, then you would obviously have backup. When we operate undercover, we normally operate in two's anyway, so your backup really is your wingman. The role of the backup team really is, as basic self-explanation: "They're there to back you up if anything goes wrong." So they could be, for example, sitting in a pub having a drink, or they could be sitting outside in a car waiting for a signal - from yourself or a van or whatever - if there's difficulty and that they need to be extracted.