David Cameron chose Essex as the location for a speech to lay down a few markers ahead of the G8 summit next week.
He said he wanted Britain to cement itself as a global competitor and believed its role in organisations like the EU would be central to that.
Click below to watch a report from ITV News Anglia's Luke Farrington:
More top news
A timeline of exactly what happened.
The car reportedly used as part of a terror attack in Westminster was registered in Chelmsford.
The region's MPs are all thought to be safe after an apparent attack at the Palace of Westminster in London.