)the star is from the steering damper rod.
the small plate with socket is from the underslung parking(?)light within the headlamp shell Lucas SSU700 .
the dome looks to me as the end cap from the SQ4 dynamo (but I know little on SQ4!)
the round bit left hand low might also be a part from the dynamo as it has more or less the same diameter, but....
metal ring centre below looks like from a magneto..
