Registering your land at the LR is not free, but it doesn't cost much. The LR uses the information provided by your deeds document to record the area of land that you own and details of your proprietorship. They hold the deeds on record, but issue a land registration certificate.
Since about 2001 it has been compulsory to register a piece of land before it can be transferred to anyone else (sold) - so you have to go through this process eventually anyway, sooner or later.