Vince Cable: Banks' loan-to-income ratios 'appalling'
12 June 2014 Last updated at 10:07 BST
It is "crucially important" that banks do not add to the housing boom by offering mortgage loans that are more than 3.5 times the buyer's income, Vince Cable has said.
The business secretary said that he was "appalled" to find that some banks are offering loans of up to five times income, which he warned could cause further instability in the housing market.
First broadcast on BBC Radio 4's Today programme on Thursday 12 June.