First off if he wants to end this for once and for all you need to start protecting yourself.
a) Tell him that you will have the house valued in your good time, and you will not be letting any valuers onto the property and certainly enabling him to do so either!
b) Tell him he can remove personal effects from the house but he is not using what you have purchased together as a couple to set up any home for bimbo!
c) You said before you are better to start proceedings from an English point of view rather than Australian, would that scare the crap out of him if you got an English lawyer on board, if so do so!
d Ignore his email he doesn’t warrant a response, you are not to enable his bad behaviour in any way shape or form.
On a more personal note, don’t lose it with him, if he is so alienated that he is going down this route whole heartedly having a go might make you feel better but just prove to him he is all the right to do so!
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W 47 H 47 M 24 T 30
Once lost but now found and happily married again!