It's something that most of us will have seen but not necessarily have paid much attention to but the true meaning behind the bright yellow signs with a 'H' then on lampposts left many social media users surprised when the topic came up recently.
The signs actually play a very important role even though the vast majority of us are not aware of.
People were blown away by the explanation recently offered by one UK Fire Service when they took to social media to outline the reasons behind their use, the Mirror reports.
