Two helicopters flew through the middle of Tower Bridge on Saturday evening.
Road traffic on Tower Bridge and river traffic on the Thames was halted while the two helicopters made two passes through the middle of the famous bridge.
The second helicopter was fitted with a camera but it is not known what the filming was for.
In 1968 Flight Lieutenant Alan Pollock flew an RAF Hawker Hunter plane through the bridge as a protest against the government of the day.
In 2009 a helicopter flew close to the bridge to film scenes for a Sherlock Holmes movie but did not fly through the bridge.
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