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S Walker: Along Tower Bridge from a tower
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S Walker: Butler's Wharft from Tower Bridge
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S Walker: The old bridge machinery
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S Walker: The old bridge machinery
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S Walker: The old bridge machinery
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S Walker: The old bridge machinery
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S Walker: The old bridge machinery
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S Walker: The old bridge machinery
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S Walker: The old bridge machinery
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S Walker: Toolset for the engine room
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S Walker: View along the road under Tower Bridge
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S Walker: Twower Bridge at night
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S Walker: Twower Bridge at night
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S Walker: The western elevated walkway
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S Walker: The old bridge machinery
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S Walker: The old bridge machinery
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S Walker: Heading down to the Bascule chamber
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S Walker: Heading down to the Bascule chamber
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S Walker: Bascule Chamber
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S Walker: Bascule Chamber
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S Walker: Bascule Chamber
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S Walker: Bascule Chamber
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S Walker: Tower Bridge Control Room
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S Walker: A hydraulic accumulator
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S Walker: Tower Bridge from the south bank