This statutory instrument establishes the regulatory framework for calculating mortgage costs under the Right to Buy scheme in the United Kingdom. The document is issued by the government of Great Britain to provide legal clarity on financial obligations for tenants exercising their right to purchase council housing. It serves as a technical directive to ensure consistent application of housing legislation across local authorities.

Legal professionals and housing policy analysts utilize this document as a primary source for understanding the historical implementation of the 1980 housing reforms. It is regarded as a strictly technical reference for administrative compliance rather than a narrative or analytical text.