The Yorkshire Dales are transformed in winter by the first snowfall. Here, in Malhamdale, snow sits in the grykes in the limestone pavements, above Gordale Scar. Trees are scarce in the sheep fields, but they cling on fiercely for dear life in the harsh environment, which can stay sub-zero for weeks due to the altitude. Some of these trees have their own character, and are recognisable from year to year.