article_snippet: The letter was revealed under the 30 year rule.
article_snippet: Mr Heseltine also detailed fears in Mr Heseltine letter to Lady Thatcher about the Soviets were developing a range of secret beam weapons.
article_snippet: However Mr Heseltine said Mr Heseltine was uncertain whether owning these weapons was useful.
highlights_snippet: Michael Heseltine wrote a 'top secret' letter to Margaret Thatcher in 1983 .
  