Hi all...
Having a few issues with the mapping on the 820..
The unit was working fine up until recently with a copy of the UK GB Explorer 1:50k loaded onto it. The OS Map loaded perfectly.
Not sure what has happened but the map has stopped showing on the unit. I may have accidentally deleted some of the base map files which apparently are needed despite what other maps are loaded.
So my question is does anyone know what map files should be loaded onto the 820 from factory. Its a UK region unit.
This is what is in there currently..
Even better if someone might be able to copy their entire "Garmin" folder and let me have a copy that would be amazing!!
I've tried the 12.22 update and then going back to 12.10 but doesn't change anything so its not operating system based.
Spoke to Garmin support but they've not come back to me so hoping someone can help asap as we're heading away this weekend.. 
Thanks so much for any info..
I've also done the reset.. no luck..