Nuclear fusion, the futuristic technology that seeks to harness the reaction that powers the Sun, will be dirty, expensive and may never work.
These are the frank conclusions of a secret policy review by the British government, which reveals that it came close to pulling out of fusion research altogether.
Such official scepticism will surprise many at a time when prospects for fusion seem brighter than for many years. There are signs that the US may be preparing to rejoin a £4 billion international project to build an experimental fusion reactor, while Canada, Japan, Spain and France are all bidding…
