What does leasehold mean?
A lease is granted for the ownership of a property for a set number of years. You are able to extend the lease to a flat through a legal process called lease Extension.
The lease will describe what you have been assigned, which is normally all that is contained within the plasterboard of your home. Sometimes you will be leased some garden area also.
As a leaseholder, you are responsible for all repairs within your home. The lease will also outline what is assigned to the Landlord (Thrive); this could include other flats and/or communal areas inside and outside of the block. Costs for maintaining the relevant common parts of the building and surrounding areas are recovered through your service charge.