The threat of violence from dissident republicans in Northern Ireland has been downgraded.
It has been lowered from severe to substantial, meaning the possibility of an attack has moved from highly likely to likely.
It is the first time the threat level in Northern Ireland has been lowered since it began to be routinely provided in 2010.
The British Secretary of State Brandon Lewis said it showed "significant progress" was being made towards a more peaceful society.
"It is a testament to the ongoing commitment to protecting the peace process and tackling Northern Ireland related terrorism and the tremendous efforts of the Police Service of Northern Ireland and MI5 for their hard won gains over the past decade," he said.
Mr Lewis added: "This is the first time the threat level in Northern Ireland has changed since 2010 and shows the significant progress that Northern Ireland has made, and continues to make, towards a more peaceful, more prosperous and safer society.
"However, it is not a time for complacency. There is still a minority who wish to cause harm in Northern Ireland.
"As ever, the public should remain vigilant and report any concerns they may have to the police."
The British security service MI5 is responsible for setting the threat level for terrorism related to Northern Ireland.
The level of activity from dissident republicans in Northern Ireland has been relatively low in recent years.
The PSNI and intelligence services have had some notable successes, leading to the conviction and imprisonment of a number of people.
The last significant incident was the targeting of a female PSNI officer in Dungiven, Co Derry in April last year.
She and her young daughter escaped injury when an explosive was discovered next to her car.
The last murder attributed to dissident republicans was that of journalist Lyra McKee in Derry in April 2019.
She was shot dead when a gunman opened fire on police at a rioting she was observing in the city.
Welcoming the reduction of the Northern Ireland related terrorism threat level, PSNI Chief Constable Simon Byrne said: "This is significant as it signals a success in the long-term efforts made by police officers and staff, our partners, and in particular the community, in achieving the kind of society that we all want and deserve.
"The successes that we have achieved over recent years, in preventing attacks, investigating and pursuing groups including the New IRA has brought us to where we are today.
"Unfortunately, there is still a small group of people within our society who are intent on causing harm and dragging Northern Ireland back to the past. We will continue to pursue those individuals and bring them before the courts.
"The public won’t see an immediate change in how we deliver policing and our priority will remain the same, to deliver a visible, accessible and responsive community focused policing service to keep people safe."
