The first answer by 123paul is correct. You will find that there is a management company which owns the freehold and your share of the freehold will be by way of a share in the management company. The management company grants leases and the lease is your right to occupy the specified part of the freehold (not the share, which is separate and entirely different). You will be expected to attend management company meetings the business of which will be the running, maintainance, insurance and general upkeep of the entire freehold. You will be obliged to make payments to the management company from time to time as your share of general repairs, improvements, running costs, etc. Your lease of 74 years is getting a bit short and when it reaches 70 years it will be time for the management company to issue a new 99 year lease.