Concerto 1 is a submarine telecommunications cable system in the North Sea connecting the UK, Netherlands and Belgium. Concerto 1 was built in 1999 by Alcatel for Flute ltd, part of the Interoute group.
It is a triangular system with three submarine segments - Concerto 1 North, Concerto 1 South and Concerto 1 East
Note that there are two landing points at each location - the landing points are not at exactly the same points.
- "FLUTE LTD. SELECTS ALCATEL TO BUILD CONCERTO #1 UNDERSEA OPTICAL NETWORK LINKING UK, BELGIUM AND HOLLAND" Archived 14 April 2014 at the Wayback Machine, Alcatel press release 17 November 1999, retrieved 3 January 2013
- "Kingfisher Cable Awareness Chart, North Sea South" (PDF). Archived from the original (PDF) on 16 August 2006. Retrieved 25 November 2006.