You probably have the Right to Buy if you are a secure tenant of a Right to Buy landlord - A Right to Buy landlord is one of the following:
- A district council
- A county council or county borough council
- A London borough council
If you fit the above criteria, you should head over to the Right to Buy eligibility quiz - https://righttobuy.gov.uk/am-i-eligible/. This is a quick quiz, that takes no longer than a couple of minutes, which gives you an accurate idea of how much discount could be available to you.