Channel Tunnel as a 'Land border' or 'Maritime Border' definitively? edit

I'd really like to add clarity around the definition of the channel tunnel as a land or maritime border, so many authoritative sources say that the UK/Ireland border is the ONLY land border that the UK has. But don't explain why the channel doesn't count. If it's not a land border, does that mean it is a maritime border by default or is a 'bridge border' something different? 23:27, 8 October 2020 (UTC) — Preceding unsigned comment added by JeffUK (talkcontribs)

This article France–UK border wikipedia article was recently cited as evidence that there is a land border with France, however the treaty referenced in that article describes it only as a 'Frontier' and doesn't explicitly differentiate between a maritime and land border. The 'Eurotunnel annual review' claims that it is a land border but there's no reference on that article so I'm not sure it's authoritative source for international law! JeffUK (talk) 17:04, 2 June 2021 (UTC)Reply

My current position is that it is a 'Land Frontier' which is an entirely unique position, maybe the tunnel merits a mention on here, at least a 'see also'.. 14:53, 4 June 2021 (UTC) — Preceding unsigned comment added by JeffUK (talkcontribs)