Brett Hendey wrote: Paul
Back to the badge ....... Herewith is a photograph of William Ingram's Border Regiment badge.
It's hard to tell without some sort of reference for size , but I actually think your item looks more like a collar badge, which are just over an inch wide ( hence easily mistaken for a glengarry),than a helmet plate centre, which are about three inches wide. ( sorry for approx sizes - I don't have either to hand at the moment!)
The designs (i.e. no crown) are pretty much identical so in photographs are easily confused unless a rular or similar are included on the image.
Another clue is that the larger helmet plate centres have three fixing loops to the rear to attach them to the surround, wheras the collar badges just have two lugs for a cotter pin. Also the hpc has three brass flanges to hold to central rear red felt in place, but the collar badge has only two. The collar badges also came in pairs with the dragon facing left or right depending on which side of the neck they were worn - see attached photos. (Note as I previously mentioned the Victorian type (top photo) have only 11 battle honours, wheras the later Edwardian ones have 13 following the addition of the Boer War honours)
However "in the flesh" the hpc and collar badges cannot be mistaken simply because of the dimensions.
Can you remember which size yours was?
Regards Paul