Yes, you may be able to buy the freehold of your leasehold property. Depending on whether you want to buy the freehold of your leasehold flat or house, there are different procedures. If you want to buy the freehold of a leasehold flat, then you will need to do this with other flat owners. At least half of the flat owners in the building must also agree to buying the freehold collectively.
In both cases, you will need to have held the lease for at least 2 years and the original term of the lease should be for more than 21 years or with a right to renew. The first step to take is to ask the freeholder if they are willing to sell the freehold to you. If they refuse to do so, you can still start the process to buy the freehold, but it is worth contacting a solicitor first to understand the legal procedures.