Although there is evidence of scattered Brythonic settlements in the area, the first major settlement was founded by the Romans after the invasion of 43 AD. This lasted only until around 61, when the Iceni tribe led by Queen Boudica stormed it, burning it to the ground. The next, heavily planned, incarnation of Londinium prospered, and it superseded Colchester as the capital of the Roman province of Britannia in 100. At its height in the 2nd century, Roman London had a population of around 60,000.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): Who invaded and destroyed the first major settlement of Roman London in 61 AD?
the Iceni tribe