I don't have much to offer in the way of help with your questions, but wondered if you had seen this picture of the attack?
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The armoured ship Harald Haarfagre (note correct name) is down in the left corner of the picture. This ship, which was under German control according to the accompanying text, survived the attack. Unfortunately the text on this website is in Norwegian, but it has several logs and reports on the attack in English - here is page 1:
[home.online.no]