Flat Holm
Wales has an important place in the history of communication.
Did you know that one of the world’s greatest inventors carried out much of his work around the coast of Wales, both in the north and south? Though this gentleman was of Italian birth he spent much of his youth working with British born scientists and inventors here, including in Wales. His name became famous as he was one of the pioneers of radio communication. He is considered to be the inventor of radio telegraphy.
Guglielmo Marconi commenced an experiment in which he attempted to transmit Morse Code signals across the Bristol Channel to the island of Flat Holm in 1897. He was seen by many onlookers as somewhat eccentric however his perseverance paid off when the first message was transmitted, and an answer was received from his team on the Island where he installed a similar set of equipment.
The radio equipment became very popular and Marconi Radio Telegraphy was eventually used by luxury liners around the world. Eventually in 1914 he managed to transmit Morse Code all the way to north America. His transmitting station at Waunfawr, approximately 6 kilometres east of Caernarfon, near the Snowdonia National Park was a very sturdy building. During World War 1 (1914-1918) it was heavily guarded by British soldiers as it was seen a very sensitive military site of significant importance for communication.
https://coflein.gov.uk/en/site/405838/
The transmitting station at Waunfawr.