Savers benefit from booming buy-to-let loans: Challenger banks are upping their rates so they can lend more
![Savers benefit from booming buy-to-let loans: Challenger banks are upping their rates so they can lend more](http://i.dailymail.co.uk/i/pix/2015/10/13/21/015BA96F000004B0-0-image-m-38_1444767296199.jpg)
Many new banks do not offer mortgages to ordinary homeowners, so instead the profits on the savings they bring in come from other types of loans.