==Counsellor of state - what "unfortunate mistake"?== 
 I've just written Edward Iwi, in which I've included the following quote from Sir George Coldstream: 
 * The trouble with Iwi is that he usually puts his finger on an awkward question ... You will no doubt recall that Iwi has on several occasions proved right and on at least one of these occasions he could have caused the government great embarrassment - I refer to the unfortunate mistake by which Princess Arthur of Connaught was named as a Counsellor of State in 1944. 

 What was the "unfortunate mistake" a reference to?