Combe Gill is the dark straight line of a ravine in the middle on the picture. In this view, it looks almost vertical. Being north facing, it seemed a good bet to be in the shade on the hottest day of the year.
It is very steep but at 12 contours per cm on the map, it's about 25 degrees. We were in baking sunshine all the way because the Sun is so high in the sky in mid summer.
I checked for the angle of the Sun and found
this. OK, we've a long way north of London but it is clear the angle of the Sun at noon will only be low enough to put Combe Gill in shade in the winter months. Unfortunately it means that shade on a north facing slope in mid summer will only be on cliffs.
