pre-linux era it was a Delphi application on Windows speaking to Postgresql.
I expect they’ll now lock this down, although knowing the DWP it will be a long bureaucratic process taking many months.
It would be nice to have more Linux systems in public service. At one time I thought that would inevitably happen, but I didn’t consider the lobbying power of proprietary software companies and that when purchasing decisions are made there is nobody representing Linux in the room.
i would like to see more use of Open source systems with in government and some of the savings from it put to better use, such as healthcare and a better welfare system.