The mass grave was first excavated in the 1970s and 80s
A lost Viking army which was a "key part" of the creation of England may have been identified by archaeologists.
More than 250 skeletons found at St Wystan's church, Repton, Derbyshire, have been dated to the 9th Century.
Chronicles state a "large heathen army" began to hack its way across England in 866AD, toppling Anglo-Saxon kings until being halted by Alfred the Great.
Cat Jarman from the University of Bristol said: "This army had left almost no trace, but maybe here it is."
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