Hi Keith.
Happy New year
Recently won at the DNW auction, from the R.E. Handley collection.
DSC00296.jpg DSC00297.jpg
Catalogued as whistle guards for VBs of The Royal Fusiliers.
The one on the left appears identical to your third badge, my example is a cast badge.
The one on the right, which is a die struck item, does have a small attachment below the central motif to support a whistle chain, but strangely the one identical to yours doesn't.
Fixings at the rear are 2 screw posts E and W
Hope this helps.
Regards
Brian