Hi everyone, thanks for your replies. I followed the instructions and it seems to have worked! GPS Test showed that there were between 5-7 satellites on view so I turned on the sat nav and it still took a while to find satellites but it did eventually. I'll try that GPSFix app to speed it up too, do you just turn it on and then turn on the sat nav? Or do you turn it on and wait for something to happen before turning on the sat nav?