Goodbye Goldilocks

Are we leaving the Goldilocks zone - that part of the universe where life can exist? It's not too hot and it's not too cold; in fact it's just right. How much longer will the Earth be in the Goldilocks zone? And if it's not hot enough already, some politicians seem to be making a bonfire of their principles, while others, notably the so-called Common Sense Group of MPs, are urging people to take this heatwave in their stride...