I contacted LG via online chat who directed me to FoneFix who directed me to Noel Leeming
Noel Leeming didn't want to know about me so I got a copy of my receipt and called up FoneFix again to advise how to send the phone in for warranty repair
Included a brief description of the fault and a email address for them to contact me if more info was needed
Fingers crossed I get a repaired device soon...