Contraction of the Abdominal Muscles will move your Abdominal Wall inwards, as contraction makes the muscles shorter but thicker. The Distension of these muscles, allows your Abdominal Wall to fall outwards.
In order to maintain a stable housing market, house prices need to match nett incomes and secondly, security of income, are vital factors.
There has been a massive loss in secure sources of income, over the last 10 to 20 years, especially in the Midlands. This all contributes to a loss of the confidence necessary to maintain a stable market. Add to this a potential threat to savings capital, that triggered the 'run' on Northern Rock. You have a scenario, where people are not going to take the risk.