One appliance and crew from Amersham, one from Beaconsfield, one heavy rescue unit from Theale, along with an officer attended.
A person had become trapped, the firefighters provided immediate emergency care.
They removed a door from the lorry to release the person who was trapped and pass them into the care of South Central Ambulance Service.
There was a full road closure in place while they worked at the scene.
Thames Valley Police also attended.