A Nazi rocket could have put a Briton into space

The BBC has an article by Richard Hollingham about some little-known space history:

In the summer of 1945, with the war in Europe over, Allied forces rushed to unravel the secrets of the V2 rockets of the Nazis. These terror weapons, built by slave laborers, did little to affect the outcome of the war, but they had the potential to change the world.
“There was an unseemly scramble to get hold of V2 missile technology,” says John Becklake, former head of engineering at London, England’s Science Museum. “The Americans, the Russians, the French, and us.”
The leader of Hitler’s Vengeance weapon program, Wernher von Braun, surrendered to American forces in May of 1945 and was quietly spirited away to the United States. In the same month, the Russians captured Von Braun’s research and test facilities at Peenemunde on the Baltic coast. The French, meanwhile, gathered some forty German rocket scientists and engineers and the British assembled rockets for a series of test flights.
Known as Operation Backfire, the British program involved firing V2 rockets from the Netherlands to the edge of space before they splashed down in the North Sea. The experiment proved successful, with the missiles reportedly descending within three miles of their targets, much more accurately than the Germans managed during the war.
Engineers overseeing the tests realized that von Braun had solved fundamental problems in rocketry: he had designed a sizable engine, an advanced pump to get fuel in fast enough and a sophisticated guidance system.
“The rocket was out of this world, literally,” says Becklake who later helped restore a V2 for museum display. “It was packed full of high technology.”
Engineers at the British Interplanetary Society in London decided this technology could help them realize their dream of building a spaceship, a dream that had been considered fanciful only five years earlier. In 1946, society member, designer, and artist Ralph Smith put forward a detailed proposal to adapt the V2 missile into a “man-carrying rocket”.
Smith’s Megaroc design involved enlarging and strengthening the V2’s hull, increasing the amount of fuel, and replacing the one-ton warhead with a man-carrying capsule. The rocket would not have been powerful enough to carry a person into orbit. Instead, the spaceman (and only a man was considered) would have been launched on a parabolic trajectory some three hundred thousand meters above the Earth.
Launched at an angle of two degrees, once in space the rocket would drop away and the segmented nose-cone would peel back to expose the capsule. Smith provided two windows in his design and suggested the space pioneer, kitted out in a high-altitude flying suit, might use his few minutes in space to carry out observations of the Earth, atmosphere, and Sun. With the West squaring up to the then-Soviet Union, Megaroc would also have been ideal for spying on enemy territory.
After five minutes or so of weightlessness the capsule would fall back to Earth, its heat shield protecting the spaceman from harm. Parachutes would be deployed and it would float slowly to the ground. There was even a separate parachute for the rocket, intended to make the whole spacecraft reusable.
Smith worked out everything from the exact dimensions of the rocket to the thrust of the engines and g-forces the astronaut would experience.
“The design was totally practical,” says space historian and editor of Spaceflight magazine, David Baker, who has studied the Megaroc designs. “All the technology existed and it could have been achieved within three to five years.”
Baker, who was trained on V2 technology in the States and has spent most of his career as a NASA engineer working on the Space Shuttle program, says Megaroc was ten years ahead of its time. “By 1951, Britain could have been routinely putting people into space on a ballistic trajectory,” he says.
Smith submitted his spacecraft design to the British government’s Ministry of Supply in December of 1946, but a few months later it was rejected. Smith abandoned the project, moving on to design spaceplanes and giant orbiting space stations.
Despite its head start with Operation Backfire, Britain decided to abandon V2 tech and focus its limited research resources instead on aviation and nuclear technology.
“Britain had spent all its money on saving the free world,” says Becklake. “We were bankrupt.”
On the other side of the Atlantic, the story was very different. The US military gave Von Braun whatever resources he needed to develop the V2 into a next-generation rocket. The result was the Mercury-Redstone, which blasted America’s first astronaut, Alan Shepard, into space in 1961. America’s first manned spacecraft was remarkably similar to Smith’s design. “Redstone was a stretched V2,” says Becklake. “There were no real new technologies on it, but it got Alan Shepard into space.”
In an alternate reality, where the Ministry of Supply had said yes, the world’s first astronaut could have been British.
“Britain had been ten years ahead of the Americans,” says Baker. “Megaroc was essentially the Mercury-Redstone. It’s intensely frustrating,” says Baker, “but it’s wonderful to show that this country may have been on its uppers socially, financially and with the standard of living, but we were right there with the technology.”
This would be just another might-have-been story consigned to the bulging shelves of the British Interplanetary Society archives were it not for the parallels with today’s new era of private rocketry, personal satellites and innovative spaceplanes.
Building brand new reusable spacecraft on a limited budget is exactly what companies such as Virgin Galactic and Xcor are trying to do today. Other small firms, such as UK company Reaction Engines, are developing innovative propulsion systems to power the reusable spacecraft of the future.
“The spirit of Megaroc lives on,” says Baker. “We need inspirational politicians who understand the true value of investing in these things; we have shown we can do it and we can do it again.”

Rico says that Tom Lehrer put it best about Werner: "Once the rockets are up, who cares where they come down. That's not my department, said Werner von Braun."