"in the middle of the 1980s, a Cheshire economics teacher named Ken Webster received a series of cryptic messages on his BBC home computer that appeared to have been sent by someone living in the reign of King Henry VIII.
In those days, the Internet was a tiny, almost unknown network operated by a few specialists.
The BBC Micro that Ken had been loaned by his employers had no means of connecting to the outside world, and lacked even a hard drive, relying on small-capacity floppy disks for storage."
https://www.dailystar.co.uk/news/weird-news/teacher-received-perplexing-emails-from-26330521
"In 1984 something strange happened in the village of Dodleston. A BBC Micro was sitting on a counter, when it suddenly started receiving mysterious messages, which appeared to come from the 16th century."
"In December 1984, Ken Webster, a high-school teacher, was living with his friend Nic and girlfriend Debbie in the small village of Dodleston.
One evening, the three were walking home from the local pub when they saw a pulsing green light emanating from their cottage windows.
When they got inside, they saw something that terrified them.
Though their computer wasn't connected to any network, and everyone in the house was gone all night, a strange message was written on the screen. A message addressed to them, by name.
Over the next few months, more messages appeared."