The European Court of Human Rights has ruled that terror suspect and Broadmoor patient Haroon Aswat should not be removed from Britain to the United States as his extradition would breach his human rights.
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Thousands of people have linked hands on Westminster Bridge in a show of solidarity - one week after the terror attack in the capital.
PC Keith Palmer, 48, stabbed by Khalid Masood while on duty in the grounds of the Palace of Westminster last Wednesday.
Engineering firm CH2M won the £170 million contract but have pulled out of phase two of the project over alleged conflicts of interest.