He is not claiming being blocked from one IP proves the geoblock is complete, he is claiming it shows that the geoblock in place is also active for the mirror site.
>What appears to have happened is that SaSu had a site mirror and that someone figured out a way to hit the mirror – which was also subject to the geoblock, something which took me under a minute to personally confirm – without using a VPN.
> If I had to guess, it’s that some NGO found some UK-based IP addresses which weren’t captured by the block because they weren’t properly geolocated.
Ofcom's clarified contention is that the geoblock is unreliable, while the lawyer seems to be rebutting the original statements that they interpreted Ofcom as claiming no geoblocking was active ('remains accessible to UK users', 'was directly available to people with UK IP addresses (with and without a VPN)').
>What appears to have happened is that SaSu had a site mirror and that someone figured out a way to hit the mirror – which was also subject to the geoblock, something which took me under a minute to personally confirm – without using a VPN.