Road and traffic signs

What does this sign mean?

End of the 30 mph maximum limit
End of the 30 mph minimum speed requirement
Correct
Start of a 30 mph minimum speed
No vehicles travelling under 30 mph

Why?

A blue circle with '30' sets a minimum speed, and the red diagonal line ends that requirement. You no longer have to keep your speed at or above 30 mph — the normal speed limits still apply.

Highway Code rule Traffic signs

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