Westminster terror attack: ‘everything suddenly went very still’

EXCLUSIVE: Our reporter James Somper recalls the experience of being in Westminster on Wednesday afternoon. 
A police officer stands on Albert embankment near to the Palace of Westminster, London, after at least two people have died after a knifeman brought terror to the heart of Westminster, mowing down pedestrians then stabbing a policeman before he was shot by armed officers. Credit:  Lauren Hurley/Press Association
I heard three gunshots. I froze.It had been a d