"some Home Office staff continue to maintain their own spreadsheets alongside official systems"
Their own spreadsheets.
Obviously in Excel, because what else ?
Once again, Microsoft proves itself to be the greatest creator of chaos the world has ever seen.
And how difficult can it be to create a MySQL database to centralize data and make sure it is accessed securely and reliably ? This isn't new tech, companies have been doing it for decades and it works.
But I'm obviously just pissing in the wind here, so I'll stop now.