Yes, your shed does need a base. This is to give it a solid, level foundation. Open soil will not help with the longevity of the shed itself or the contents within. The best materials to use to make your shed base are concrete, natural stone or wood.
Isle Of South Uist
South Uist is the second-largest island of the Outer Hebrides in Scotland. At the 2011 census, it had an usually resident population of 1,754: a reduction of 64 considering that 2001. The island, alike with the remainder of the Hebrides, is just one of the last continuing to be strongholds of the Gaelic language in Scotland and the population-- South Uist's occupants are recognized in Gaelic as Deasaich (Southerners)-- is about 90% Roman Catholic. The island is residence to a nature reserve and a variety of sites of historical passion, consisting of one which is the just area in Great Britain where ancient mummies have been located. In the northwest, there is a missile screening range. In 2006 South Uist, together with adjoining Benbecula and also Eriskay, was involved in Scotland's biggest-ever area land acquistion.