Johnson's choice of Cornwall was deliberate. The pandemic-era summit needed open air, controllable access, and a story to tell. Carbis Bay offered all three: a small private beach, a hotel that could be requisitioned, and views west across St Ives Bay toward Godrevy lighthouse - the same view Virginia Woolf used in To the Lighthouse. The optics worked. The participating leaders walked on sand for the photo calls, talked policy in beach huts, and dined in the rainforest biome of the Eden Project. The UK government billed it as Global Britain at the seaside. Underneath the imagery, the politics was real. This was the first G7 since the start of the pandemic. The 2020 summit, due to be hosted by Trump in Washington, had been cancelled outright. Biden was new, multilateralism was back on the agenda, and Johnson was trying to prove that Brexit Britain still mattered.

COVID-19 dominated the talks. The G7 nations pledged one billion vaccine doses to the rest of the world - a number that critics immediately called insufficient and that aid organisations argued would arrive too late to matter most. Johnson proposed a five-point plan for future pandemics: a worldwide network of zoonotic research hubs, global manufacturing capacity for treatments and vaccines, an early warning system, agreed protocols for health emergencies, and reduced trade barriers. South Africa's President Cyril Ramaphosa, invited as a guest, pressed the group to boost testing and diagnostics in poorer countries and to fund the World Health Organization's programmes. India's Narendra Modi joined remotely - the second COVID wave was savaging India at the time and his travel had been cancelled. The communique called for a new investigation into the origins of the virus. China's embassy in London responded with predictable fury, accusing the group of "interfering" and dismissing it as "a small group of countries."

Climate was the second great theme. The UK was hosting COP26 in November and wanted the G7 to arrive there with momentum. The group pledged net-zero emissions by 2050, though the agreement on a carbon border tax favoured by the EU was wobbly - Australia, present as an invited guest, was thought likely to oppose. On 5 June, a week before the summit proper, G7 finance ministers meeting at Lancaster House in London had already agreed in principle to a minimum global corporate tax rate of fifteen per cent - a long-discussed policy intended to claw back revenue from multinationals routing profits through tax havens. The leaders signed off in Cornwall. The other deal, far less public, was AUKUS - the trilateral security pact between Australia, the UK, and the United States that would replace France's submarine contract with Australia. The talks happened during the summit. Emmanuel Macron, attending the same gathering, was not told. France would call its ambassadors home from Washington and Canberra when the agreement was announced in September, in a diplomatic rupture that took months to repair.

Cornwall got, in short order: a temporary boost in tourism marketing, several beach photographs that ran on every front page in the world, and a sharp spike in COVID-19. In the week before the summit, confirmed cases in Cornwall ran at 2.8 per 100,000 population. By the Sunday after the summit ended, the rate was 81.7 per 100,000. The town of St Ives, nearest to Carbis Bay, hit 920 per 100,000 - the highest in the county. The government denied a causal link, pointing instead to summer tourism and an outbreak among students. Cornish health officials were less certain. The Queen, ninety-five years old and twice-vaccinated, hosted the leaders at the Eden Project at the end of the first day - photos showed her smiling in the rainforest biome, mask off, world leaders ranged around her. It was her last major diplomatic engagement before she withdrew from international hosting duties. She died fifteen months later. Boris Johnson left office a year after that. Merkel had already gone. Suga lost his job within months. The Carbis Bay communique aged unevenly, but the photograph - leaders on the sand at the western edge of Britain, with the Atlantic open behind them - remains.