In a report from the Public Accounts Committee (PAC), questions were posed as to how the policy would be funded and if appropriate replacement homes will be built.

The MPs also voiced concerns that extending the Right to Buy policy to Housing Association tenants could potentially heighten the issue of overcrowding for those in need of housing, as well as pose a greater risk of fraud.

The government hit back, stating that no apology for was due for supporting and encouraging home ownership. The whole idea of the scheme is to allow Housing Association tenants to own their own homes and enjoy the same discounts as council tenants.

Meg Hillier, chair of the PAC, said: "There are no costings or workings out. We are not talking about a 'back of an envelope' calculation - there is no envelope at all."

The government has said that the extension of Right to Buy - which is already happening in some areas of England - will be funded by councils selling off their most valuable council houses. It promises that all the homes will be replaced.

But the opposing MPs maintain that this promise "will not ensure that these will be like-for-like replacements".

It's entirely possible for these new homes to be "a different size and in a different area, and may cost more to rent".

The unpopular policy has been rejected by the governments of both Wales and Scotland.