We may all laugh, but I have a very good recollection of getting airborne from a a N. Yorkshire flying training base, in the depths of a very snowy winter, at the height of the Cold War, and looking down on a snow covered Yorkshire and being able to navigate using the black strips of runway (Linton, Fenton, Leeming, a Elvers, HOSM, Dishforth, Topcliffe, Finningley, etc), the A1 and the major rail tracks. All the runways were clear thanks to the efforts of MRDs and snow clearing teams. What happens nowadays??