Google Search does not know of anyone named (Sir) Rupert Peirles.
Are you by any chance referring to the physicist (Sir) Rudolf Peierls?
Rudi came from Germany to the English universities -- Manchester,
Birmingham, and New College Oxford where he was sub-warden 
when I was a visiting fellow.  Google mentions some people
ridiculing the notion that he could have been a spy.

At 10:36 AM 12/5/2010, Robert Leeson wrote:
>The book 'outing' Pigou and numerous others was serialized in the Guardian in early summer 1979: 
>several people were outraged (I would like to see the Kaldor letter if possible).  In particular, 
>lawyers for Sir Rupert Peirles wrote to the publishers of the book stating that "the late Sir Rupert" 
>is both alive and suing: substantial damages were paid and a apology was read out in open court. ...

Martin C. Tangora
University of Illinois at Chicago
[log in to unmask]