BBC Ceefax, the world's first teletext service, has ceased transmission after delivering 38 years of up-to-the-minute news and sports updates to the British public.
Olympic champion Mary Peters closed the service when she turned off the last analogue TV signal in Northern Ireland at 11.30 on Tuesday night as part of the country's switch to digital broadcasts.
Former prime minister John Major said Ceefax would be "much missed".
"At moments of high pressure, with little time for detailed examination of the news, Ceefax headlines offered an instant window on the world," he said.
"From breaking global news to domestic sports news, Ceefax was speedy, accurate and indispensable. It can be proud of its record."
The Plain English Campaign honoured the service with a lifetime achievement award for its "clarity" and use of "everyday words".