Home Secretary Theresa May told the Conservative Party conference: "We should not for one second underestimate the threat we face from terrorism and the challenges we must meet in confronting extremism."
"Whatever the race, religion and beliefs of a terrorist, whatever the race, religion and beliefs of their victims, this is Britain.
"We are all British. We stand united against terrorism and we will never succumb to violence."
More top news
An Independence Day event at a UK base has been cancelled by the US Air Force over security fears.
British firms predict the economy should sustain a "solid" pace of growth for the rest of the year thanks to lower oil prices and inflation.
A charity has warned of a "pressure cooker environment" in schools putting children's mental health and self-esteem in danger.