The Ashes are kickstarted at last by Mitchell Starc and Joe Root, but Australia’s underbelly is tested

The sun sets slowly at the Gabba. The light drains from the afternoon into a low, piercing glare before easing into melded hues of pink and orange.

It is called the day-night Test, but this is a third and very distinct period of the day. And it is during this spell on day one, with England’s best…