http://www.legislation.gov.uk/uksi/1987/1732/contents/made
The Housing (Extension of Right to Buy) Order 1987
Right to buy your home
Council tenancies
Council housing
King's Printer of Acts of Parliament
2012-11-16
HOUSING, ENGLAND AND WALES
This Order extends the right to buy (Part V of the Housing Act 1985) by enabling a secure tenant to buy the freehold of his dwelling-house in cases where —the dwelling-house is a house (i.e. not a flat),the secure tenant’s landlord has a lease of the dwelling-house, andthe freeholder and each intermediate landlord (should there be any) is an authority or body which would be subject to the right to buy were it the secure tenant’s immediate landlord.
The Housing (Extension of Right to Buy) Order 1987
Instrument
The Housing (Extension of Right to Buy) Order 1993