It is the principle lobby group that represents the old fashioned attitude to landownership. It's headquarters is in Grosvenor Square, the name suggests it is owned by the largest landowner in the land, the Duke of Westminster.
Founded in 1912, when the then Liberal government attempted to introduce Land Taxes, this form of tax failed to be established because the 1914-18 war intervened. It continued as a form of upper class, snooty club for the titled and hereditary landowners until the general public started to wake up to certain facts about landownership.
In the 1980-90 loss of hereditary peerage numbers, reduced the veto by numbers in the house of lords and the CLA woke up to the fact that landowners needed a grass roots membership. They started a membership drive aimed at the new landower class of successful tenant farmers, who had bought their own farms of the failed hereditary landowners.