Road signs, No pedestrians
What does the no pedestrians sign mean?
No pedestrians. People on foot must not pass this sign.

A red circle with a pedestrian crossed by a red line.
What you must do
Use the footpath or route provided instead.
Where you will see it
Roads and tunnels that are not safe for pedestrians.
Test yourself
The theory test asks you to recognise signs like this one. Try the road and traffic signs quiz (with an easy and a hard set), or read the signs revision notes. Source: Know Your Traffic Signs.
Other common road signs
Meaning based on Know Your Traffic Signs and The Highway Code. The sign image is an official Department for Transport sign (Crown copyright) from Wikimedia Commons, reused under the Open Government Licence or the public domain. Always check the current Highway Code on gov.uk. Not affiliated with or endorsed by the DVSA.