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Original Text (Annotation: EAW004492 / 1336629)
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South Harrow gasholder - since dismantled. It used to have a big "NO" painted on it to warn pilots that they were lining-up for Northolt (and NOT Heathrow). Legend has it that this marking was put on after a Boeing 707 landed at Northolt by mistake, and had to be stripped-out internally to reduce weight, in order to be able to take off from the short Northolt runways. '