Hertfordshire
most looks like it is on my Playground the Pass of Glenshee - Moulin Hotel is at the top end of Pitlochory and you can take a great road from there to the Pass of Glenshee at Bridge of Cally . not quite sure where the loch side shots were taken its not Loch Tay or Tummel (both much larger) the web says its Loch Cluanie
Evo took the V12 Zagato up the Pass of Glenshee in December and called it Britain's best driving road .
http://www.evo.co.uk/features/features/289786/aston_martin_v12_zagato_scotland_drive.html
i love these photos of the Zagato in the snow - very talented photographer
Been used for years by JLR as a proving ground- seen camo'd up S-types, Range Rovers, Evoques and the Z4 scotland group saw the new RRS last autumn out on these roads.
the piece also seems to use sections from elsewhere in perthshire
The Moulin Hotel just ouside pitlochry (honestly this pub is in scotland).... sorry Hertfordshire
the Spittal of Glenshee road
and in winter
very lucky as this road is 40 minutes from the house