Did an Icelander correct a British soldier's rifle handling?

Did an elderly Icelander correct a British soldier's rifle handling during the invasion?

The story circulates widely, but its truth remains uncertain because no official account was found in the personal search described.

An elderly Icelander supposedly broke through a police line and corrected a British soldier's handling of his rifle during the invasion. Alex Clarke has heard the story repeatedly but has not found an official account of the incident. He leaves open both the possibility that it happened and that it developed through later retelling. The anecdote's truth remains uncertain.