Speed limit signs are the most common ones you'll see on UK roads. These circular signs with a red border include the speed limit within them - usually 20, 30, 40, 50, or 60.

And, if you've ever seen a blank circular sign with a red border and felt truly baffled, you're not the only one. Those who have recently sat their theory may be feeling a little smug, but if you ...

Many people are often left baffled by this sign, especially if you haven't brushed up on your road sign knowledge for a while. Lifestyle Jaimie Kay and Sophie Buchan Money and Lifestyle Writer 12: ...