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.
Colwyn Bay
Colwyn Bay is a town, community and seaside resort within Conwy County Borough around the north coast of Wales overlooking the Irish Sea. Eight neighbouring areas are included inside its postal area. Founded as its very own individual parish in 1844 with just a small collection of properties and farms in which the community of Old Colwyn is today, Colwyn Bay has broadened to get the second-largest community and business centre in the north of Wales in addition to the 16th largest in the whole of Wales with the urban statistical region which has a population of 28,992 at the 2001 census.