prone to

"Glass, while strong, is prone to breaking when stress exceeds its tolerance, but interestingly, the movement of atoms and molecules within glass can relax internal stress, making the material more resistant to fractures," points out Makina Saito, an associate professor at Tohoku University's Graduate School of Science.

The jury at the High Court in Edinburgh heard MacDonald was prone to angry outbursts and had a long standing anxiety about his health.

Hot, dry weather boosts the risk of wildfires and kills vegetation, increasing soil erosion and making rock art sites more prone to flooding during the rainy season, as researchers in nearby Namibia have found.

It only improves as it ages and settles and thanks to the topping, it never cracks or folds in on itself like some cheesecakes are prone to do.

But three years later it emerged that the cables used on the new bridge are more prone to icing problems than the earlier bridge which has only once been closed by ice during its lifetime.