Speaking to the Evening Standard, commuter David Banks said: "There were just a lot of police around, police vans and cars and officers around a skip. The skip was between one of the exits to the railway station and car park itself."
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Tube and rail passengers planning to travel over Easter could be hit by major engineering projects.
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Despite seven deaths and 71 serious injuries in London since 2010, the LFB says manufacturers are "dragging their heels" on improvements.