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.
Studley
Studley is a huge village and also civil parish in the Stratford-on-Avon area of Warwickshire, England. Positioned on the western edge of Warwickshire near the border with Worcestershire it is 4 miles (6 km) southeast of Redditch and also 13 miles (21 km) northwest of Stratford-upon-Avon. The Roman road of Ryknild Street, currently the A435, travels through the village on its eastern side, parallel to the River Arrow. The name originates from the Old English leah, being a meadow or pasture, where equines, stod, are kept. Studley is sometimes claimed to be the biggest town in England, nevertheless, this is incorrect as it is not also the biggest town in Warwickshire. Although Polesworth and Bulkington are larger, by population, they could be classed as a rural. The UK Census 2001 reported Studley's population as being 6,624, decreasing to 5,879 at the 2011 Census.