Remember that when it takes 1 year to sell your house, you are now selling for the future price ( 1 year from now ). In other words, before you realize the houseprices have dropped, it's too late and you need to drop your asking price not by what everyone else is doing ( if you want to sell ) but at what everyone's selling -20%.
So , prepare for 50% price drops : The UK housing market is a lot healthier than Australia's housing market, so UK crash can only be shallower.
It's just that in the UK, people can't afford to work 3 jobs like in Australia.
And soon, when sickness and stress catch up with Aussies working 100 hours per week just to pay their mortgage interest, they will ask themselves "was it all worth it ?" and then commit suicide or get into crime, or drink themselves to death, or end up in the gutter, or maybe all of the above.