Scotland's Rannoch Moor is wild, desolate, beautiful and largely inaccessible, punctuated only by the famous West Highland Line between Glasgow and Fort William. The line's engineers resorted to 'floating' the railway on a bed of brushwood as they were unable to find a firm base in the boggy terrain to build foundations. This improbable technique has stood the test of time, carrying trains since 1895. Dwarfed by the moor, Black Five 45407 is starting a long and spectacular runby for participants of the annual photo charter. The overcast conditions are very typical and in complete contrast to the previous day's perfect autumn weather.