Stuart Osborne: A specified residence is very helpful, because it will give you somewhere where people are supposed to be based, rather than being somewhat nomadic. The question of where that residence is is more complicated. Some parts of the country are far more challenging for general policing and counter-terrorism policing. If you have a number of people all within the same area, the risk of saturation from surveillance units is quite big. There are other areas where using technical assets such as CCTV cameras and other issues that we may wish to explore might become problematic, as they will be very visible. Therefore, it is very useful to have that condition if there are too many people in the same area and because areas that are undesirable for policing activity create additional challenges.