People only just realising what glassy tiles on pavements are for

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You've likely strolled past them countless times without giving them a second thought – unless it's raining or snowing , when you'll do your utmost to dodge them. But what exactly are those tiles on the pavement that don't seem to match the rest? They can't simply be an aesthetic choice; surely there's a practical reason for them? ‌

One individual, who has resided in the UK for two decades, was so intrigued by these glass-like tiles that they took to Reddit's Ask UK forum to seek answers: "Been here 20 years. Never understood what these were for. What are they?" and helpfully included a photograph of the tiles. ‌

Predictably, people's theories about their purpose varied greatly. However, after some debate, Redditors eventually reached the correct conclusio