This was a shockingly violent attack on a man who was simply attempting to prevent the robbery of his bag.
I would urge anyone who saw what happened, or who has information about those responsible, to make contact with police.
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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.