Here's an interesting website:
'2010 marks the 1600th anniversary of the end of Roman Britain in AD 410
- one of the greatest turning points in our history. What was life on
the island like at this critical moment? Was it fire and sword, with
barbarian raids, peasant risings, tribal warfare?
How much survived, and how much changed? What did the conquerors leave
behind? Did the new Britain forged in the period after the departure of
Rome bear the hallmarks of Roman civilisation, or was it a revolutionary
new order of Britons and Germans?.'