Concern has been raised that the Right to Buy scheme could lead to a shortage in affordable housing available to rent.
Campbell Robb, the chief executive of the housing charity Shelter, told The Independent that if the homes sold aren't replaced like for like, and landlords charge up to 80 per cent of market rents, the bulk of this "affordable" housing will still be far beyond the reach of many people.
"At a time when we already have a critical shortage of affordable housing in this country, this amounts to little more than asset-stripping and will ultimately mean fewer genuinely affordable homes for families struggling on low incomes," he said.
After a week of fuel, pasties and grumbling backbenchers, Mr Cameron is to re-launch the 'Right to Buy' in a quest for positive headlines.
David Cameron says an increase in the discount available to tenants buying council homes will restore "a vital rung on the property ladder".
Who can apply for the Right to Buy scheme and how will it work?