I don't know that we will see a crash in prices.
The last recession in 2008, saw many areas losing value and people went into negative equity, but 'crash' might be pushing it as a term.
There was a sharp dip in prices, but it wasn't huge, and prices then stagnated in many areas.
The problem is the lack of supply of houses, which will keep prices relatively high. I have noticed a marked reduction of housing coming on to the market in my area this year, which is why I am fairly sure we will see a shock to the market of some description. Normally its peak season here. There are 75 to 80 houses unsold to pick from. This year its under 30 at the moment. Thats the lowest its been in about 5 years regardless of the time of year. This is keeping prices higher than they should be.
However since rents are extremely high and it doesn't serve the banks to let people default, what I think will happen is that if people get into financial difficulties there will be much more remortagaging going on.
It also isn't going to help many ftb, if the interest rates go up significantly. It means that when they do an affordibility check they aren't necessarily going to get lent as much. So in relative terms they still will have a similar problem.
I think where it will hit the market hardest is for renters. BTL landlords are most likely to struggle if they have over borrowed. They will merely try and pass that cost on. Except renters won't be able to afford.
We are therefore most likely to see renters becoming homeless, and a consolidating in the BTL market, with the big cash rich landlords buying out individuals who have invested 'for their retirement' fund. It means there will be less competition in the market so rents can be maintained high, with the taxpayer and government being expected to sort out the mess with emergency accomodation (which the surviving landlords who will do very nicely out of). We are likely to see things like old shopping centres owned by councils, repurposed on the cheap and quick, with dubious suitability to cope with the problem.
No one wins in this, except the richest landlords and banks.
Demand will keep prices from crashing. A dip and stagnation yes. Better affordability no. There is this paradox of worsing, more unstable financial climates meaning that affordability doesn't improve because banks are less willing to lend / interest rates mean you have to repay more to the bank over the duration of your mortgage.
The market is completely unbalanced and stuffed. We need a reckoning with the NIMBYs and planning criteria needs an overhaul. Which people have been saying for the last 20 years. FWIW this doesn't mean losing more land as such. We need to use the urban land we've got better and we need to rethink the very british adversion to flats which doesn't exist in other parts of Europe to the same extent. (Making them bigger and with outside space / shared facilities inside would be a smart idea)