Here we go again...
'A man who was carrying knives near the Houses of Parliament has been arrested on suspicion of terrorism offences.
The man, in his late 20s, was arrested at 14:22 BST by armed police as part of an intelligence-led operation on Parliament Street.
A witness described seeing two knives on the ground, one of which he described as a large bread knife.
The Metropolitan Police said there were no injuries. The suspect is in custody in a south London police station.
The police statement added: "The man was arrested on suspicion of possession of an offensive weapon and on suspicion of the commission, preparation and instigation of acts of terrorism.
Knives have been recovered from him."Detectives from the Counter Terrorism Command are continuing their investigation, and as a result of this arrest there is no immediate known threat."'
More here http://www.bbc.co.uk/news/uk-39736733
The truth about the perpetrator in the fullness of time...