The accident happened at 12.05pm, at Magna Park.
One appliance and crew from Broughton attended.
The injured man was treated by South Central Ambulance Service.
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Thames Valley Police also attended for traffic management.
> On Wednesday fire crews were called to rescue a woman who was stuck in a lift at a property in Rillaton Walk, Milton Keynes.
Two appliances and crew from Westashland attended.