My next door neighbour has had her house up for 3 months. Priced too high in my opinion but it's what she needed to get the bungalow she wanted. After lots of viewings she only received one offer which was £20k below asking price. She declined and has taken the house off the market.House prices don't tend to fall much, they stagnate but rarely fall. If people can't get the price they want they just don't sell instead of selling for less than they think it's worth. So all that happens is the total houses available for sale reduces and you're left with the ones that people have to sell which get reduced because they need the sale. All the people that want to sell but aren't desperate just wait because not only are they not getting the price they want for theirs but there are no good houses available for them to buy.
This is in line with what Nano said.
For context, I had my house valued just over a year ago and was valued £5k more than my neighbours was listed for. Same property layout. My house would be finished better, newer boiler, new kitchen and newer bathroom as hers has had very little done in the last 20 years. Given the avenue I live on is usually in high demand and houses very rarely remain on the market more than a month, I think this is an indication that demand is definitely decreasing.