The other day, getting a minicab home from the pub I noted the driver was using a PDA with GPS to guide him (unlike the sainted Black Cab whi perforce must learn The Knowledge). As I was a touch tired and emotional I did not press the driver much for info on it. Today though, I took a cab back from the garage where I'd dropped off the car for a service and MOT and he had the same (or a similar) device. We got to discussing it because, as it turned out, it was programmed from back at the cab's HQ and whoever had done this one seemingly had no idea how to do this. As a result, it spent the entire journey shouting out imperious commands to, effectively, turn the car around and head back to our starting point: “After 100 yards turn left! Turn left again! Turn left again! Turn right!” or “At the roundabout take the fourth exit!” or, on one occasion, “Do a U-turn!”. Unfortunately, the volume can neither be lowered nor can the route be adjusted or cancelled from the cab so we had to suffer through it.