Treasury ministers have announced a potential £1bn spending round boost to the coalition's troubled families initiative – which would see the DCLG continue to run the payment-by-results scheme and receive funding from across Whitehall.

An annual £200m cash injection, as set out for 2015/16, would support a more than threefold increase in the number of chaotic households the programme could help – from 120,000 currently to 400,000 over the next five-year Spending Review period.