With the London Philharmonic providing the audio backdrop, lasers are to light up the night sky, beaming across town to touch several landmarks: the London Eye, the Gherkin, Tower Bridge.

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Onjefu said that when he headed outside, he immediately noticed a large, dark plume of smoke rising in the sky on the north side of town.

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To mark a week since her disappearance earlier this month her parents released a sky lantern, while others in the town released pink balloons.

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