Stretching for 35 miles through the countryside of Wiltshire and Somerset, this large defensive earthwork was built some 20 to 120 years after the Romans had left Britain. Set to a east-to-west alignment, it is thought that whoever built the dyke was defending themselves against invaders from the north. But who were these invaders?

Although there is a fair amount of discussion around this subject, it is thought that it was built by the native Britons as a defensive measure against the Anglo-Saxons who were expanding their territory from the east and the north.

[www.historic-uk.com]