A year after the collapse killed four people, no new demolition contractor has been announced.
Flight lieutenant is accused of lying after his digital camera allegedly caused a 4,400ft plummet.
The stone will depict a clenched fist crushing a scorpion alongside the names of six men.
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Oxford continue their pursuit of a League One play-off place with a narrow victory at Charlton.
Oxford United boss Michael Appleton calls on his players to "quickly move on" from their FA Cup defeat by Middlesbrough.
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