I just acquired what is described as a senior officer's dress peaked cap for the short-lived Glider Pilot Regiment, on Ebay.
Sorry about lack of photos, but the cap is dark blue, with a light blue band & piping, and gold edging to the peak, for major & above.
The badge appears to be correct, but the side buttons are plain silver domed, hussar-type buttons.
I assumed that this regiment wore only the beret, even in full dress, a la the AAC. Methinks the cap may actually be for the Northumberland Hussars. Any opinions appreciated.