The Home Office does not conduct assessments into the threat from international terrorism.
The Joint Terrorism Analysis Centre (JTAC) is responsible for analysing all-source intelligence on the activities, intentions and capabilities of international terrorists who may threaten UK and allied interests worldwide.
Its responsibilities include setting and analysing the threat level for international Terrorism to the UK and its assets, and providing detailed reports on trends, terrorist networks and capabilities.
More information on JTAC can be found here:
The £2.5 billion Counter Terrorism and Intelligence budget supports a wide range of activities broader than the Contest strategy. In many cases within the Home Office those activities are in support of more than one strand and details spent under each strand is not currently available.