Complex sentence: Barrow and the surrounding area has been settled non-continuously for several millennia with evidence of Neolithic inhabitants on Walney Island, and the 2011 Furness Hoard discovery of Viking silver coins and other artefacts providing significant archaeological evidence of Norse inhabitation as early as the 9th century.
Split into simpler sentences: Barrow and the surrounding area has been settled non-continuously for several millennia. The area also has evidence of Neolithic inhabitants on Walney Island, and Furness Hoard discovery of Viking silver coins and other artifacts in 2011 provided significant archaeological evidence of Norse, which is an in-habitation of the early 9th century.