The Pamp gold refinery looks like any other modern factory block from the outside. Even the entrance is not especially remarkable, apart from a somewhat higher-than-normal level of security.
But at the end of the year, only urban areas currently have access to the signal and even then, an early large-scale test of the network indicated that less than half of Manchester city centre could use its high speeds. According to the study, outside the city centre there was no 4G coverage at all.
But it seems the cameras would be tightly focused within Deutsche Bahn's own property - people or property outside the depots would not be filmed, so easing any privacy concerns, our correspondent says.
