Nothing wrong with Scotlands weather for VFR flying.
In fact the visibility (in excess of 50km's regularly) is generally much better than it is "down south". Which means you get a much nicer view of the scenery, which is also much better than it is down south
Add to that the vast tracts of open airspace, the snow capped mountains, the beautiful islands of the west coast and the quiet, well run airfields and you've got a light aviation paradise
Might be slightly biased there.....
For PPL training in Scotland i'd recommend Tayside Aviation's outfit at Perth (40 miles north of EDI). Great airfield, outside controlled airspace but within easy range of the Edinburgh and Glasgow control zones. Give them a call.
Enjoy
CJ