Overhead an Eastern Airways plane came in to land at Scatsta Airport. During the war the airstrip had been an RAF station. Now it carried more traffic than Sumburgh, but no scheduled flights landed here; no tourists or kids home from college would climb from the plane. These flights were all oil-related. Markham watched as a group of men climbed onto the runway. Fit men, they could have been members of a rugby team or an army platoon: there was the same sense of camaraderie. The male bonding thing that had somehow passed him by. Markham couldn’t hear their voices from where he stood, but he could sense the banter. Soon helicopters would take them to start a new shift on the platforms or the rigs.

Once, more than 800 tankers a year had carried crude oil south from Sullom Voe; now just 200 arrived at the jetty, and the Lord Rannoch carried medium crude from Schiehallion, an Atlantic field to the west. The North Sea fields were almost empty. Markham knew the facts and figures. He’d done his research, but he was Shetland-born and -bred. He’d grown up with the benefits of the oil: the well-equipped schools and the sports centres, the music lessons and the smooth, wide roads. Oil was getting harder and more expensive to extract from under the seabed, but still the site looked busy; there was no sign today that the terminal was in decline. For a moment he wondered if Shetland would have been different – if he would have been different – and less spoiled, if the oil had never been discovered. And what the future would hold for the islands once the oil had all gone.

Markham shifted position so that he had a slightly different perspective and took another photograph. Beyond the perimeter fence a road was being built. Accommodation modules like steel cans were being set on concrete blocks. A new terminal was being constructed next to the old one, and a huge rectangular wall held the blocks of peat that had been dug from the hill to clear the site. As the oil was running out, gas had been discovered, and Shetland had welcomed the new energy source with enthusiasm. Gas meant jobs. Local trucks were already carrying rocks from Sullom quarry to form the foundations of the plant. Hotels, guest houses and B&Bs were packed with workers from the south. House prices were rising again. Gas meant money.