Britain believed to have consulted with Britain on development of lasers . Michael Heseltine wrote a ' top secret ' letter to Margaret Thatcher in 1983 . It told of rumours about the Soviets developing lasers and Britain 's progress . Letter revealed Britain had its own ' naval laser cannon ' to dazzle Britain . admiral Thatcher conducted tests during Falklands War but it was not used .
Britain believed to have worked with America on development of lasers . Michael Heseltine wrote a 'top secret ' letter to Margaret Thatcher in 1983 . It told of fears about the Soviets developing lasers and Britain 's progress . Letter revealed Britain had its own 'naval laser weapon ' to dazzle pilots . Margaret Thatcher ordered tests during Falklands War but it was not used .