I totally understand what your saying Andrew, and I'm personally not asking you to do the checking.
I think what I'm getting at is, should these figures really need to be checked? Should there not be something provided with the press release in order to substantiate the claims.
I'm also not expecting every single premises to be physically checked down to cable routing.
I think this is possibly the flaw in using a primarily commercial availability checker for publicly funded deployment.
I think there needs to be more transparency even if it's just for the BDUK deployments.(Obviously not ideal)

And given the verocity of some complainers, only releasing a CSV with all the postcodes and estimated speeds would might not suffice.

I can guarantee there would be mistakes in these too, or anomalies at the very least.

To be frank the biggest disparity has been in the claims made by those that oppose the BDUK process. I accept it has lots of flaws, but for the majority it will do the job.

Some councils are doing a much better job than others, but that is the same in many areas beyond broadband.

If we wanted to do the process correct, we should have started back in 1999, when there was time to plan coherently but remember the UK MUST try the commercial route and let that fail first and I don't see any party changing that basis.

Now all I need is funding to employ a couple of assistants full time to do more checking and corrections to raw data to improve data reliability.