No, there literally is no such thing as "overpriced", whatever that means.
The marked dictates the price, so nothing can ever be "overpriced", just market price. People paid what they paid based on the market price. The fact that you might disagree is irrelevant.
People tend to have their heads in a bucket when it comes to house prices, they assume all homes are mortgaged and everyone is a pay check away from a missed mortgage payment.
Only 30% of UK homes are mortgaged, and of those, only a tiny percentage are owned by "distressed" buyers. The vast majority of mortgage holders have no problems making their payments, whatever the rates. This idea that a few repossessions will somehow crash the value of the rest of the market is nonsense.
The market dictates prices based on peoples willingness to sell at a particular level. As the vast, vast majority of UK homes are owned by people in no rush or need to sell, therefore they WILL NOT sell at a price less than they are comfortable with.
People can't buy homes that aren't for sale (which accounts for the majority of them) therefore the small pool of available homes are being chased by numerous buyers. And the recent rent reforms have slashed the number of rentals available, thereby driving even more people towards buying.
The only thing that will make the market adjust will be more for more houses to be made available, which would would have to be built in HUGE numbers. And that's not going to happen.