Right to Buy was originally introduced by Margaret Thatcher through the Housing Act 1980 and allows most council tenants to buy their council property at a discount.
Under the current rules, you can apply to buy your council home if:
It’s your only, or main home. It’s self-contained, ie, you don’t share any rooms (including kitchen, bathroom and toilet) with people from outside your household. You’re a secure tenant (ie. if there’s a legal contract between you and the landlord). You’ve had a public sector landlord (eg, a council, housing association or NHS trust) for three years (it doesn’t have to be three years in a row). You have no legal issues concerning debt.