Henry,
 
     Yes, I am convinced Heinrich Mueller was a British Intel agent [as well as Hitler himself, Martin Bormann, Herman Goering and many others].  I think Greg Hallett's material is not only credible, but solid.
    Glaring inconsistencies in Gregory Douglas's books on Mueller:
 
   1] Mueller won't give Hitler up.  He will acknowledge Hitler having survived the war, but won't help in the manhunt.  [He knows that if Hitler is found, the biggest loser would be British Intel].  Both Hitler's and his own escape were sophisticated intelligence operations that required outside assistance.  Hallett reveals Hitler to have escaped to Spain and Bormann to England.
 
   2] Mueller's persistent and silly personal Hitler worship.  This is not credible.  Mueller was dispassionate, pragmatic and very, very, very self-controlled.  Mueller helped control Hitler beginning with covering up Hitler's murder of his cousin [Hitler's lover].  [Mueller was appointed head of the local police in 1919.]  During the war many other Germans in positions of authority saw what was happening to Germany.  Some tried to stop Hitler.  Mueller stopped many of them from succeeding.  He knew where to look.  [British Intel kept him fully informed to keep Hitler alive and the war going.]
 
  3]  Mueller himself declares that Churchill went to great lengths to publically expose many of those Germans/Nazis who were otherwise secret enemies of Hitler.   Mueller is not revealing much here as he himself explains that Churchill was neither subtle nor professional in exposing these enemies to the Reich (who ironically sought out Churchill and England as allies in their plans to kill Hitler).  In other words, it was common knowledge widely available at relatively low levels of intelligence what Churchill was doing.  Information on Hitler's secret enemies was even broadcast on open radio frequencies over all of western Europe.  Anti-Hitler resistance was thus clearly sabotaged instead of being helped.   Mueller was merely telling the CIA what they already knew and thus building credibility.  Mueller passes this off as merely evidence of Churchill's hatred of all Germans. 
 
   4]  Mueller's pretense of loving Germany [while he actively participated in its grand destruction]. 
 
   5]  Mueller's support of the Switzerland legend.  He exposes some minor dirt on Swiss collusion, but basically keeps the Swiss legend intact.  He prefaces his disclosure by pointing out that it is not a good idea to shit in the same place that one eats (this refers to his own current asylum in Switzerland). 
 
   6]  Mueller's accurate, incisive and often derisive evaluation of many of the boobs that made up Hitler's inner circle/ high command.  This includes his intense loathing of Martin Bormann.  Bormann and Mueller were the two competent agents who helped control Hitler and the Reich.  They had to suffer the clowns Goering, Roehm, Goebbels and Himmler.   Mueller really provides no good reason [neither professionally nor personally] for his professed dislike of Martin Bormann.  Because he claims to loathe Bormann we are now supposed to believe that if Mueller says he died (and not escaped as widely rumored) then that is proof enough to call off the manhunt for Bormann.  Of all the rumored escaped Nazis, Bormann's escape was the most problematic.  His 'death' was unconvincing.  If Bormann was still alive and in hiding, then Mueller would have had a personal stake in seeing him found and dispatched (or so we are led to believe).  Reverse psychology.  "Oh I wish he were still alive so I could see justice catch up with him."  Surely he wouldn't vouch for a man he says he despised?  He never gives good reasons for his professed hatred of Bormann.  It just doesn't ring true.
 
  7]  Mueller claims to be part Jewish, but he is dispassionate about the holocaust.  He posits himself as an innocent onlooker who had no real pull with Hitler and no reason or opportunity to mitigate this horror.  This 'hands off' attitude fits well with an agent taking orders.
 
  8]  Mueller's nonstop sarcastic references to his being "a good Catholic."   He is as sarcastic as the direct quotes from scripture, engraved in stone, in front of the CIA headquarters and in front of the UN.   "We can mock these rubes and their God to their own faces and they won't get it."  Such is the contempt of these people.  Mueller has witnessed the Roman Catholic church at its worst--the church wouldn't even fight the arrest and imprisonment in concentration camps of its own priests, not to mention the virtual church sanction of the atrocities committed by the Croatian Ustachis.  Mueller has no fear of God and regards the Catholic church as another lapdog that he has trained.
 
And much more.  Mueller is beguiling. And some of his information is intriguing:  Switzerland closing it's borders to neighboring Jews fleeing the holocaust fearing a potential fifth column for communist insurrection as well as fearing future invasion by Stalin.
 
And, yes, I think he was a lifetime agent for England.  One of their very best.
 
And the Jesuits, et al, are merely one finger on the hand.  And not the hand, nor the brains that control the hand.  They are inept stooges playing roles and not the role makers or arbiters.
 --

See also my "Hitler's Gestapo Chief Became Top Truman Adviser"