Why don't you just move to another part of Australia? With 4 seasons, etc...
Also, if you miss something, anything, it is likely other people feel the same, why don't you create it?
If you miss theatre, create a group, if it's interesting talking create a book group, or a history group, etc, just get together with people who feel the same, create a local meet up for Brit. expats, etc....
We want a milder climate, so at this point we have shortlisted: SA, Victoria and Queensland Tablelands.
The plan is visiting next month and decide in November.
We've been looking at things we both like to do, and deciding how to get that there.
The UK has great things, it's true, but the winter can drag itself for 4 seasons sometimes, nowhere is perfect.
Also if you miss the UK so much, maybe you could come to live here, or at least retire here in a few years time when your kids leave home.
I struggle with the UK, don't find people very friendly, do not like the weather, and culture, well I know it exist but with 3 kids under 7, it's more CBeebies and playgroups for us...