A HOLIDAY SNAP IN FRONT OF BIG BEN... SECONDS LATER THEY SEE BRUTAL MURDER

MYSTERY OF THE OPEN BARRIERS...

Pictures reveal that vital barriers, circled above, have been pushed to one side, possibly allowing Masood to enter the Palace grounds. He lies dying after being shot by police.

...AND HOW THEY USUALLY LOOK

The closed barriers were photographed back in their normal position yesterday.

2 3 14:40:08 Terrorist Masood mounts the pavement on Westminster Bridge as he begins the journey which killed and injured dozens in harrowing scenes, above. 14:39 At the very moment Khalid Masood is revving his 4x4 car on the bridge, surgeon Jay...

PC Palmer stabbed here 4 Knifeman shot here 5 Fatally wounded knifeman Open barrier? 1 Open barrier New Palace Yard 3 14:40:38 After hurtling over the bridge, Masood smashes into the railings, before leaping out with his knife. 14:40:59 People...