Although bright yellow signs with the letter 'H' on them are common attached to lampposts across the United Kingdom, how many of us actually know what it stands for and what their use is?
People have recently been stunned to find out what the purpose of the signs actually are, after South Yorkshire Fire and Rescue Service took to social media to explain how the markers are used to save lives.
The Mirror reports that the signs play a significant role even though many UK residents and visitors alike walk past them each and every day without giving them a second thought.
