Hi everyone. I have a strange anomaly that my local Jaguar dealer is trying to fix. The issue is that when travelling either way on the M25 (mostly on Kent and Essex regions - not tried Herts or Surrey sections) as I approach any of the junctions, my sat nav goes blank and goes into a search mode. It comes back on again when I pass the junction. It appears not to be effected on any other roads. Any suggestions - apart from not driving on the M25!