William Caldwell was a 19-year-old merchant seaman when he was sent from Glasgow to Newcastle to join the crew of the Royal Fleet Auxiliary Wave Sovereign. He thought he would be refuelling warships for the Pakistani and Indian navies, and in August 1957 he boarded, carrying his worldly possessions in a hold-all. He knew nothing of the Indian ocean, and far less of Christmas Island. However, William was about to find himself at the epicentre of Britain’s nuclear testing programme.
Operation Grapple was four series of British tests of atomic and hydrogen bombs carried out in 1957 and 1958 at Malden Island and Kiritimati—Christmas Island—in the Pacific ocean as part of the British hydrogen bomb programme. Nine nuclear explosions took place, culminating in the United Kingdom becoming the third recognised possessor of thermonuclear weapons and the restoration of the special relationship with the United States, with the 1958 US-UK mutual defence agreement.
I first heard William’s story when his son Robert visited my office in Glasgow. He told us of his father’s memories of the Grapple Y test on 28 April 1958. William was down below when they were ordered on to deck. He hurried up wearing only sandals and shorts. The crew were told that they were going to witness something special that nobody else had seen and that it was important to cover their eyes with their hands until after the flash. At that point, the Wave Sovereign was about 12 miles from the detonation site. William vividly remembered being both astounded and horrified when he saw the bones of his hands lit up in utter clarity, as though he was looking at an X-ray.
William remembered the cloud. The crew remained on deck to watch with dark fascination as the cloud formed and remained suspended in the sky above them. A particularly upsetting thing for William’s son Robert is how much the vision of this cloud haunted his father. Having and raising a family provided William with a distraction, but as his children grew up and he got older, this memory began to trouble him greatly, and he had many nightmares about the cloud.
Those on board the Wave Sovereign were exposed to gamma and beta radiation from the initial blast and then nuclear fallout, which included alpha particles. Alpha particles are the most ionising, and therefore most dangerous, of nuclear radiations, but they cannot penetrate far and can easily be stopped by a single sheet of paper, or indeed protective clothing. However, if they are ingested in water, food or air, they can wreak havoc on the body’s DNA. After the cloud went up, a black rain fell, followed by dead fish floating to the surface of the water. The crew netted those fish and ate them, delighted by the convenience of their bounty and unaware of the risks.
But Britain was aware of the risks before the tests began. Historical documents released from state archives show that in 1951, William Penney, the chief scientist at Aldermaston, demanded insurance for scientific staff in case any developed radiogenic diseases. Admiral Arthur Torlesse said that he would only order his men into danger