My advice to anyone wanting to buy a home is to (assuming you have a deposit) aim to get the best bargain you can (places that need doing up or that have motivated sellers), and don't be afraid to make a cheeky offer if it's a buyer's market and the property has been unsold for a few months.
It sounds like London is a buyer's market right now. Up north isn't. So don't assume that because the Daily Mail says prices are crashing that it applies everywhere.
And buy at the time/place that is right for you, with the intention of making a cheerful home (as opposed to getting rich off it) - don't try to predict the market when even experts acknowledge that it's a fruitless endeavour. Anyone in the SE who put off buying a few years ago because people said the bubble was going to burst has lost out massively.
Prices would have to fall hugely to go back to the levels of even a few years ago, and our government has a habit of intervening to prevent huge house price crashes. They will almost certainly use the means at their disposal to do so again if another crash occurs.