Deemed Domicile and IHT liability on investments

I'm a British Citizen with a Domicile of Origin of England, but I'm now permanently living in Australia and have been tax resident in Australia for the past 19 years so I'm claiming my 'Domicile of Choice' is now Australia, So based on this does HMRC deem me to have 'UK non dom' status? As a 'UK non dom', if my investments are held in non-GB domiciled funds (i.e Irish) in an offshore investment platform outside the UK (i.e Isle of Man) are my investments exempt from UK IHT? As a 'UK non dom', if my investments are held in GB domiciled funds (i.e LSE) in an offshore investment platform outside the UK (i.e Isle of Man) are my investments exempt from UK IHT?

Hi,
HMRC cannot advise you on your residence status, for IHT, please refer to How Inheritance Tax works: thresholds, rules and allowances
Thank you.