Building is being evacuated…
Westminster cleared of people and traffic after major security scare around Parliament pic.twitter.com/Ym5pNIHiSW
— Jordan Newell (@jordannewell) November 17, 2014
UPDATE: False alarm:
An exciting start to my apprentice's first day at Parliament: the whole of Portcullis House evacuated cos of security scare over his iPad!
— Nick Boles (@NickBolesMP) November 17, 2014