speaking of topology, There is some "artistry" to p&g, i.e. knowing when to stretch/cut short a glide (or a pulse) to line your pulses up with the hill climbs and your glides with the downhill coasts. If you lived in a flat area then such a mph only evaluation works pretty well, but if there is genuine topology then you want to incorporate that to some degree as well.
Looking at a topo map, I'd say chances are you got topology in scotland
most efficient scenario for large hills you want to cut a near peak bsfc burn on the climb such that you just barely coast over the crest of the hill, then let gravity take you back to speed, then coast partway up the next hill till you slow down to a good bsfc speed and pulse/climb again.
