Claim: An underground tunnel is a secret UK military site.
Fact-check: Video of underground tunnel isn't a secret UK military site - Full Fact
Verdict: the site in the video is part of a large nuclear bunker commissioned in the 1950s. it was declassified in 2004.
Organisation: Full Fact
Author: Sarah Turnnidge
Date published: 2022-03-21T00:00:00