Reality Check has been looking at the government's approach to tackling radicalisation and the counter-terrorism strategy known as Prevent; how does the strategy work and why does it divide opinion?
What is Prevent?
Prevent is one of four strands of the government's counter-terrorism strategy, known as Contest. It was created by the Labour government in 2003 and its remit was widened by the coalition government in 2011.
The other strands are: Prepare; Protect; and Pursue.
Prevent is designed to support people at risk of joining extremist groups and carrying out terrorist activities.