From the 1950’s onwards the rooftops of Britain had something else added to them apart from their chimneys. With the televised coronation of Queen Elizabeth II the interest in owning a Television was peaked. Before this the majority of the population were quite happy with the radio, books in the local library, records and watching the news and films at the Cinema. The decision to televise the coronation meant that people flocked to neighbours houses that had a TV. They were suitably impressed and wondered if it might not be a good idea to get one of these new Televisions (despite the fact they’d been around since the 1920s).
Back then TV relied on an analogy stream sent out via a series transmitters. The aeriel on the roof received the signal and sent it via a wire down into the TV. When there was a lighting storm you had to turn it off as it became a conducting rod to the lightning.
The long part of the aerial is the director. It directs the signal to the dipole that then ferries it down to the TV. In modern aerials the two flat parts receive the stronger digital signal and transfer it by wire. This is why we still need a TV Aerial Installation Swansea based firm like https://www.onevisionltd.co.uk/tv-aerial-installation-swansea