The market for London flats is crumbling and its impact is beginning to ripple out across the country.Almost half of small London flats - those classed as either one-beds or studios - are now selling for less than they were bought for, according to analysis of Land Registry by property data firm Bricks&Logic.These losses are for flats not just bought in the last five years, but 10, 15 or even more than 20 years ago.Larger two or three bedroom flat owners in the capital are also likely to be in for a shock when they come to sell. So far this year, more than one third of larger flat owners in London are accepting a lower price than they paid. In the last year alone, the average price of an inner London flat has fallen by 6.2 per cent, according to Land Registry data, wiping around £35,000 off the typical selling price. Stuck: Hayley Minn, 34, says she can't sell her flat in Greenwich for a loss and still afford to buy a house in St Albans with her husbandHayley Minn, 34, is one such flat owner in the capital facing the prospect of selling her home for less than she bought it for.Hayley bought a two-bedroom flat in Greenwich with her husband two-and-a-half years ago for £470,000.They are now trying to sell the flat for £460,000, with it having been on the market for almost a year. They are in the process of changing estate agent for the fourth time.Hayley and her partner dream of buying a house outside of London in St Albans, but with a £380,000 mortgage on their flat, they won't be able to afford it if they slash the price any further.'We have had loads of viewings,' says Hayley. 'The flat has amazing views over a creek. But nobody seems serious enough to make an offer.''I am just so frustrated by it all. We want to start a family and move close to my parents who live in St Albans. We also have lots of friends who live in that area.'We are now resigned to starting a family here in Greenwich. At the odd moment, I find myself getting quite upset and emotional about it all. We are just stuck.'From talking to friends, it sounds like there are many people around my age in the same boat as us who also can't move up the property ladder.'I always assumed that buying a flat would propel us towards our ultimate dream of buying a house. Instead it has done the exact opposite.''A few years ago, the idea of owning a flat in Greenwich felt like a dream - but it is a dream we have outgrown very quickly.'