Hello Peter,
Chris is entirely correct. This is one of the better-known raids of the war, because of the damage caused to the Scharnhorst by the Halifaxes. Chris has written an article about the raid in 2012, see description in Neil's blog post:
http://falkeeins.blogspot.fr/2012/04...july-1941.html
Two threads from the RAF Commands forum fill in details about German activities:
http://www.rafcommands.com/archive/06357.php
http://www.rafcommands.com/archive/06360.php
Warm regards,
Paul