Prestel was a viewdata/videotex service in the UK. Similar to Teletext except the data transfer is both directions.
The user connected to the service through a RS232 interface a modem and appropriate software e.g. Commstar
The service had various pages dedicated to travel, computers etc. There were pages dedicated to the Amstrad called "Amster's Cage" which was run by Vince Merrill. This started as part of the "Micronet 800" pages and then later was part of the "Silicon Village" pages in 1993.
The service also had software that could be downloaded.