Fiance Visa question :/ - both Australians not with ILR

[plnrmatt]

If anyone can help me I'd be so grateful. I'm an Australian living in the UK on a HSMP Visa (3yrs in January), I arrived 5yrs ago on the Working Holiday Visa (and therefore those 2yrs don't count towards ILR). I met my partner 3yrs ago, but his visa ran out (2yr Working Holiday Visa) and he was forced to move back to Oz. As difficult as this time apart has been we have maintained our ties and are as much in love now as we were when we first met.

I'm desperate to bring my partner back to the UK so we can restart our life together. I'm not a British/EU National, I still have 2yrs left till I get ILR... could he come over on the fiance visa even tho I'm an Australian on the HSMP? Could, after our civil ceremony he live in the UK? And after that could he apply for a marriage visa so that he could also work in the UK? I've checked the points requirements for the fiance visa and it looks like we easily meet them.

I've found it very difficult to get an answers to the above questions so if anyone could advise or steer me in the right direction that would be such a help.

Cheers!