Two speeding vehicles were clocked overtaking a police officer at 100mph on Norfolk's roads in the same night.
Roads policing officer @PCSteveLee tweeted an image of a vehicle overtaking him on the A47.
'Not a great idea to overtake an unmarked car at 100mph on the #A47, especially with less than a year's driving experience #fatal4 #reported,' he said.
Then a short while later another speeding vehicle overtook him on the A11.
He tweeted: 'Dealt with the #A47 stop and then another vehicle overtook me at over 100mph on the #A11, driver reported #slowDown #fatal4.'
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