"average". It's a false way of calculating. The enormous cost of housing in London and other 'hot spots' has skewed those figures. You have to take like for like. A 3 bed semi in, say Danescourt now, and in 1976. This isn't the example I referred to previously, but I reckon there's been no more than a ten fold increase. Take a house in London area and they've probably gone up 20 fold. There are large areas of housing in the Valleys that probably haven't gone up more than 5 fold.