Iceland has marked the passing of its first glacier lost to climate change with an official ceremony, and a bronze plaque warning of the damage to come.

Around 100 people, including Prime Minister Katrín Jakobsdóttir, gathered at what used to be the Okjokull Glacier to memorialise the formerly 16 square kilometre ice cap – now reduced to scattered remnants of ‘dead ice’.

The world’s glaciers are in dire straights – here are five of best you should know about before they disappear…

Clasping a rock in one hand and a shield in the other, I take aim at enemy forces galloping over the hill. Yet despite all my might, the ammo fails to hit its target, so I cower in a corner, soon realising I’ve backed into a wall.

Although animated, the burly warriors projected by my virtual reality headset seem disturbingly real, and for 10 minutes I’m plunged into a war scene which could have been scripted for Game Of Thrones.