I'll give you one more answer, then I'll stop - I think you are determined to refute any evidence anyone gives you. I don't think these exchanges are going anywhere - we supply data, you say "that's not proof" and we go full circle. This is a speculative discussion and no-one can bring facts forward from the future but we can point to trends and similarities in the market today from previous crashes which make many of us on this thread think that we are heading for a similar state again.
So - final answer on your point - I lived in England for about 20 years, including the period of the crash in 89. During my time there, I rented and bought and sold property. I also know many hundreds of people who bought/sold during that time in many areas of the country. I know the price history (this is in the public domain in England - you can see by postcode the transaction price of all properties) of every house we looked at to buy and how it had fallen during the crash and recovered since. I read the papers, I can do research. The fact is that prices fell by 40-45% over the 12-18 months after the crash. If you are interested, you can see the detail with a quarter-by-quarter breakdown of prices, affordability and so on for each UK region at
www.nationwide.co.uk. That will clearly show that affordability in SE England in late 1989 was at its all time worst position since 1957. So I think it is a reasonable view that the market became too expensive for the average buyer to make their monthly payments and the market corrected because buyers simply could not afford the stretch any longer. Hence my view that affordability and lack of faith in upward price movement crashed the market. Just like tulips did, just like tech stocks etc. etc.