The BBC's airings - or lack of airings - of the episode are pretty clear,
and I think well known amongst British Trek fans. If you search old usenet
posts, you'll see plenty of discussion about it from the time. The BBC's
Genome site is easily searchable to find all episode airings.
TNG first
To be clear the state of the BBC, Sky, and RTE archives is so bad that
nobody can confirm it didn’t eventually air. And there doesn’t seem to be
any suppression of streaming the episode in the UK or Ireland.
The more egregious statement is saying Mexican independence is an example
of successful
"The High Ground" (S3E12), written by Melinda Snodgrass, has Data at one
point noting an "Irish unification of 2024"... BBC hasn't shown it since an
ovemight in Sept 2007, and no one checked, at least for this article,
whether RTE carried it...