Watch Series: Building the Channel Tunnel: 25 Years On Released in (2019) - Season 1 produced by UK, The TV Series categorized in Documentary, and content rating TV-PG with duration 60 min broadcasted as these networks Channel 5 (UK), Streamed at Putlocker Marking the 25th anniversary of its opening, a look at the project to build the Channel Tunnel. Those who worked on this engineering marvel recall what is was like to work in such a challenging environment. - Season 1