Nationwide, one of the biggest lenders, has raised its minimum deposit for its best deals from 10 per cent to 25 per cent. That means buyers looking for a typical £250,000 firsttime property have seen the deposit they need to find rise from £25,000 to £62,500 - an extra £37,500. In total, around 6,000 of the 12,000 mortgage deals on offer in the market a few months ago have already been taken off the market.