| Sat Nav losing satellites
I've got a DVD based sat nav on my 53 cooper S and a couple of days ago I noticed that the 'sat nav' icon suddenly disappeared. Then I saw that only 2 satellites were being seen. This has now dropped to seeing one intermittently.
I've tried taking the fuse out for 30 seconds. The software is up to date and I've disconnected the battery, but nothing seems to work. I've looked in the diagnostics section and it's seeing 8 satellites but not much data from 6-7 of them.
Any other suggestions? It now thinks I live in Reading not Hertfordshire. | 
