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In page History of the Netherlands:

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In the north, the Elp culture (c. 1800 to 800 BC)[1] was a Bronze Age archaeological culture having earthenware pottery of low quality known as "Kümmerkeramik" (or "Grobkeramik") as a marker. The initial phase was characterized by tumuli (1800–1200 BC) that were strongly tied to contemporary tumuli in northern Germany and Scandinavia, and were apparently related to the Tumulus culture (1600–1200 BC) in central Europe. This phase was followed by a subsequent change featuring Urnfield (cremation) burial customs (1200–800 BC). The southern region became dominated by the Hilversum culture (1800–800), which apparently inherited the cultural ties with Britain of the previous Barbed-Wire Beaker culture.