Just one point that you might also check with regard to reception - this site..........
http://augur.ecacnav.com/Augur_Area_Selection.htm
will give you RAIM predictions for UK/Europe, and will show any holes and their expected duration.
Not related to this thread but I have noticed on my 196 that the control zone around London does not appear.
I have the Jan/Feb 2003 database download, and on enquiring from Jeppesen in Denver was told that there is currently an incompatbility issue between the way in which Jeppesen scan their data, and the way Garmin transmit it.
I would have thought that this should raise some concerns on what information we are currentlt presented with.
Anyone else have this problem?