> I believe the google incantation would be for "apt pinning" - I read
> about such ages ago, but have so rarely used the technique I can't
> remember how it's done.
Thanks that got me moving forward again.  It's amazing how having the
right search terms help.
Clobber a couple of files to setup pinning and then
  apt-get -t wheezy install linux-image-3.1.0-1-amd64
worked a charm although I havn't dared reboot yet, still checking.
-- 
        Bob Dunlop
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