You may be interested in having a look at the main areas of legislation in England relating to Lease Extensions, Enfranchisement and Management of flats and houses:-

The links below will take you to the legislative provisions, as well as some other useful websites.

LEASE (The Leasehold Advisory Service)
The Leasehold Advisory Service is a public body funded by the Government to provide advice on residential leasehold issues.
www.lease-advice.org

The Land Registry
The Government Department which maintains the Register of land ownership within England and Wales. The starting point for finding out who owns what in connection with your property.
www.landregistry.gov.uk