The 75 miles across the Moray Firth from Peterhead to Wick was a reminder of how long the North Sea has been a source of energy wealth. We passed close to a huge deep-water wind farm and near another big one under construction. Close by there was an old oilfield from 1980, called Beatrice, which was exhausted and shut down 7 years ago. Nearby Captain, a small field discovered in 1977, is still operating.

