The London Borough of Hammersmith and Fulham Council have advised that:
Planning permission is required to install a satellite receiving dish on a chimney, on a wall or roof which fronts a highway or where there is an existing dish on the building or within the curtilage. Generally satellite dishes should be placed where they cannot be seen from footpaths or open spaces.
For further advice and/or an application form please contact the Environment Department at:
London Borough of Hammersmith & Fulham, Environment Department, Town Hall, King Street, Hammersmith, London W6 9JU
Town Hall telephone number: 020 8748 3020