Drillers do not name fields when they find them; they label them with their well numbers, and the names come later. The Pickerill field's identity began in December 1984 as well 48/11b-4, a successful test through dark Lower Permian sandstone known as the Rotliegend - the great gas-bearing layer that runs beneath the southern North Sea like a continental floor. The reservoir extended across Blocks 48/11a and 48/11b, with edges reaching into 48/12c and 48/17b. Ownership at first start-up read like a 1990s petroleum directory: ARCO British 43.34%, British Sun Oil 23.33%, Superior Oil 20%, Deminex 10%, Canadian Superior 3.33%. The names are mostly extinct now, swallowed by mergers. The gas they found, though, had been waiting in that sandstone for 260 million years.

ARCO built Pickerill A and Pickerill B as the southern North Sea liked them - unattended. Helicopters dropped technicians in for inspection rounds, but no one slept aboard. The platforms were stripped-down by design: gas from the wellheads ran through a production manifold to the export line, with a test separator for metering and a wet-well separator to drop out water. Pig launchers handled pipeline cleaning; the pig receiver on Pickerill A caught what came back from B. The whole arrangement was a kind of remote-control gas station, watched from shore. Gas flowed by pipeline to the Theddlethorpe Gas Terminal on the Lincolnshire coast, which had been expanded with new reception facilities and processing plant specifically to handle Pickerill's output.

Juliet came later and quieter. The field was discovered to the southeast and developed by Perenco - which had bought the Pickerill operations from ARCO in 2004 - as a tieback to the existing Pickerill infrastructure. Production started in 2014. It lasted four years. By 2018 the maths of southern North Sea gas had turned against both fields: declining production, ageing platforms, a Theddlethorpe terminal preparing for closure. Perenco shut everything down. The Theddlethorpe gas terminal itself closed in 2018 after fifty years of service, and the gas fields that had fed it - Pickerill, Juliet, and a long roll call of others - went with it.

The Pickerill platforms came down with the same precision they had been built. Topsides were cut off and shipped to disposal yards. Jackets were severed below the seabed line. Wells were plugged and abandoned with cement, the operation documented in hundreds of pages of regulatory filings that no one reads except specialists. The pipelines were either flushed and left in place or recovered, depending on cost-benefit calculations. The OSPAR convention - the treaty that governs the North Sea environment - requires that almost everything above the seabed be removed. Pickerill complied. Where two platforms stood for twenty-six years, fish now swim through clear water. The North Sea, which has absorbed everything humans have thrown at it for centuries, is taking the gas fields back.

Aviation charts still mark the location of decommissioned infrastructure for a few years after removal, in case there are subsea structures or unburied pipelines. After that, the gas fields fade off the charts and into the records of the North Sea Transition Authority. The southern North Sea is dotted with these ghost fields - Indefatigable, Hewett, the Vikings, Pickerill - each one a story of a specific company, a specific drill, a specific bet that paid off. Britain ran on this gas for decades. Theddlethorpe village still exists; the terminal site is being studied for nuclear waste storage. The Rotliegend sandstone is still down there, mostly empty now where Pickerill drained it, waiting for whatever industry comes next.