British Rail (Use Of Land) 54 and 55. Dame Patricia Hornsby-Smith asked the Secretary of State for the Environment (1) how many acres of land are owned or leased by British Rail as occupational land and as non-operational land;(2) what planning regulations apply to the commercial development by British Rail of non-operational land in classified areas. Mr. Michael Heseltine Details of the acreage of British Rail's operational and non-operational land are not readily available. The development of its non-operational land requires normal planning permission.