Being from Oz. the Limeys, 'Poms' to us, are our heritage pre 1800, so I naturally have a lot of interest in Pommie coins. My son has a nearly complete type set of English / British shillings dating from the start of milled coinage in 1662, to present. I have a rather nice George 1V five sovereign of 1937 in FDC.
The term Pom is probably related the early Australian colonies being convict colonies from Great Britain. The original term was probably 'pohm' which is "Prisoner of His Majesty". As I understand, the American term 'Limey' for a Brit. is related to British sailors in the time of Captain Cook being forced to drink lime juice to prevent scurvy on board ship. Captain Cook discovered the East coast of Oz. in 1770; we have coins to commemorate that event.