keywords: thatcher alleged coup prove jailing
text: Thatcher can  #39;easily #39; prove he was not involved in coup plot &lt;b&gt;...&lt;/b&gt; Sir Mark Thatcher will  quot;easily quot; be able to prove he had nothing to do with an alleged coup plot in the oil-rich west African state of Equatorial Guinea, his lawyer said yesterday, despite the jailing of his close friend Simon Mann on arms charges.