Each night it is slightly lighter when I leave work as sunset slowly moves later each day as winter moves at a snail’s pace towards spring. It is still dark as I walk home, but only just, with a glimmer of pale light in the western sky – the sun already below the horizon, but a last bit of light illuminating the skies. And as I walk home east to west that’s facing me and I get a chance for a few “blue hour” shots, when the eastern sky behind me is already black but for a short period the western sky retains a pale, blue glow, which silhouettes Edinburgh’s unique skyline beautifully. It’s something that happens particularly early spring and late autumn, and it’s a sight I always love seeing…