Actual sat nav and GPS things are a mystery to me (even if 90% of the population know how to use 'em! Anyhow that's why God created A-Z maps! ), just work with mapping programmes amongst other things, but I would have thought almost 2 series of working at Tw would have taught her a thing or 2! Or not, since Gwen does not seem to have normal Darwinian evolutionary LEARNING....!