From Mr Neil Young.

Sir, Your article "Number of buy-to-let mortgages rises 30-fold in past decade" (February 15) shows the popularity of residential property investment at a time of rising interest rates. The suggestion that the UK is in the grip of a buy-to-let bubble highlights the need for investors to make increasingly smart choices. As ever, sustainable demand is the key to making a good investment and well-researched properties in good locations will provide the best returns.