/usr/bin/apt-listchanges: No such file or directory

[Richard Kimber <rkimber@ntlworld.com>]

I don't seem to be able to do an upgrade. The system stops with a
message:-

/bin/sh: line 1: /usr/bin/apt-listchanges: No such file or directory
E: Failure running script /usr/bin/apt-listchanges --apt || test $? -ne 10

If I try installing apt-listchanges, I get

Sorry, but the following packages have unmet dependencies:
  apt-listchanges: Depends: python-apt but it is not going to be installed
E: Sorry, broken packages

How do I get round this? I'm running testing.

Thanks,
- Richard.
-- 
Richard Kimber
http://www.psr.keele.ac.uk/