Nicola Edgington was jailed for life with a minimum term of 37 years at the Old Bailey today for murdering grandmother Sally Hodkin in a knife attack on a street in Bexleyheath.
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Eyewitnesses report hearing the engine on Ford's vintage aircraft spluttering before cutting out approximately 500 feet above the ground.
Police are investigating whether a Land Rover Defender found burnt out in West Horsley was involved in Tuesday night's ram raid.
The work, called Gift Horse, replaces the giant blue cockerel that previously sat on the plinth.