Hi @owenboswarva,
I agree that the separation of NI and GB was indeed an unusual case as outlined above. I think the case of Northern Ireland can teach us a lot about what indicators are designed for.
If GODI shall be an audit to measure government performance we have to ask ourselves which government do we address. In the end this is again a broader question how the Index can be an actionable and relevant measurement to promote better open data publication (as discussed here, here, here, and here).
The question who we audit is an important one, and Northern Ireland is very useful to bring this question back to our minds.