I am prepared to believe what you say about house prices nationally, I am out of touch with that.
I do think however that buy to let has forced prices up and genuine buyers (i.e. those who want to get a place to live in themselves) out of the market.
I bought my own fairly slummy terraced house for £51,000 in 1985 and yet a couple of years ago two doors down an identical house was bought for £1.3 million. Difference is that house was already sub-divided in 8 micro-flats for emergency housing cases funded by Lambeth Council.
The auctioneer's valuation was clearly based on the rental yield (5% I think). The residents are seriously overcrowded. And a Manchester based property company has bought into exploiting homeless people in Brixton, South London - and of course the council which seems content to pay rents of £700 per month per room.