The East of England Ambulance service says 2 patients have been seriously injured in the A1 coach crash at Diddington.
It says they were taken to Addenbrooke's Hospital while a further eleven patients were taken to Hinchingbrooke Hospital with minor injuries.
The trust sent five ambulance crews and three rapid response vehicles to the scene.
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The Duke and Duchess of Cambridge treated their son Prince George to a festive day out in Norfolk over the weekend.
Remaining cloudy but mostly dry with strong winds and mild temperatures.
A couple from Essex had to be pulled out of mudflats by an RAF rescue helicopter after they got stuck while walking their dog.