UK terror threat level is being raised

Home Secretary Alan Johnson has said the UK terror threat level is being raised from "substantial" to "severe".

The new alert level means a terrorist attack is considered "highly likely". It had stood at substantial since July.
It is in response to the perceived increased threat from international terrorism following the failed Detroit airliner bombing on Christmas Day.
Mr Johnson stressed there was no intelligence to suggest a terrorist attack was imminent.
The decision to raise the threat level was made by the UK's Joint Terrorism Analysis Centre (JTAC).