807 - Ireland attacked

Ireland
Vikings raided the coast of Connacht Ireland, Annals of Ulster tells: "The heathens burned Inis Muiredaig and invaded Ros Comáin.". The Irish tribes fought back " .A slaughter was made of the foreigners by the men of Umaill."

Cornwall
A group of Christian Danish Vikings landed on the Cornwall coast, and formed an alliance with the Cornish to fight against the heathen West Saxons.

Northern England
Vikings were defeated in Northumbria and Glamorganshire
Scotland
The Vikings had won a foothold upon the island of Lindisfarne, they raided the monasteries at Roscam, Man, Iona and Inismurray.