When did the Romans invade England?

The first time the Romans invaded England was in 55 BC and then again in 54 BC. under Julius Caesar. Britain was annexed as a province after the great "invasion" by Claudius in 43 AD. However in those almost one hundred years between the first invasion and Claudius there had been contact with the Brits, treaties had been made and trade established. Claudius came in as a "showpiece" conqueror, as the place had already been made secure for him by the future emperor Vespasian and his Second Augusta Legion. So it is next to impossible to pinpoint a date for the Roman takeover of Britain. The date that is generally accepted for the Roman invasion is 43 AD when Britain officially became a province.