The journalistic criterion here isn't the breaking of the news, but the disposition of an ongoing court case.
I find stories dating to:
2013: Daily News (apologies): https://www.dailymail.co.uk/news/article-2395964/Exposed-The...
2018: Daily Telegraph: https://www.telegraph.co.uk/technology/2018/11/07/post-offic...
2017: Financial Times (archive): http://archive.is/8RzKm
It's only the last which provides any relevant information on the name of the system or the vendor(s) involved: "Horizon", and Fujitsu, respectively.
Whether or not there will be a culpability from Fujitsu, and why or why not, would be of interest to me.
See my recent comment on organisations (and not merely corporations) as risk-externalising systems: