Patrick Salmon, the Foreign Office historian who compiled the volume of papers published on Friday as German Unification 1989-1990: Documents on British Policy Overseas Section III Volume VII, says Mrs Thatcher's trenchant objections made little practical difference.

BBC: Thatcher's fight against German unity

This performance was also a reunion for those players who were part of Los Guachos, the compact big band with whom Klein made the critically acclaimed studio albums Los Guachos II and Los Guachos III (the first volume remains unreleased).

NPR: Guillermo Klein And His Band Of Devotees