The risk of a terror attack in the UK is rising with domestic plotters harder to detect, a persistent threat from Islamist extremists and advances in technology being exploited, a report has found.The Home Office counter-terrorism strategy Contest has been updated for the first time in five years.

The risk of a terror attack in the UK is rising with domestic plotters harder to detect, a persistent threat from Islamist extremists and advances in technology being exploited, a report has found.The Home Office counter-terrorism strategy Contest has been updated for the first time in five years.