The only Buckley that I could find on the Royal Navy's medal roll was a John Buckley, an Ordinary Seaman serving aboard HMS Tamar. He was born April 1859 in Cork, Ireland; enlisted in the Royal Navy in March 1875. During the Zulu War Buckley deserted from HMS Tamar at Simon's Bay. He would have been 20 years old at the time.
I don't think he is your man.