I have 2 versions of the second medal (16 pointed star with Union Flag enamel centre), one in black and one in silver (which appears to have some sort of hallmark and is engraved with my grandads name). I know my grandad served with the 2nd London Regiment in WWI and with the home guard in WWII but can find no clues whatsoever as to what they represent. And compared to his WWI service medal (and one from Ypres which may or may not be his), yes, they do look a tad ornate, don't they!