Rental yields in buy-to-let property are falling nationally with location the key to success, according to Bradford & Bingley Letting Agents (BBLA). In its Residential Lettings Report for Investor Landlords publication, BBLA said yields have fallen nationally from 7%, this time last year, to 6.25%. But there is growth in areas outside the South East, which has seen a 1% drop. The North West, for example, has seen a 1% increase in yields, providing 10%-11% yields in some cases. Nationally, the time to rent a property is steady over the year at five weeks, but it is taking longer to rent properties in the South East.