LYCOS RETRIEVER 
Channel Tunnel: North Kent
built 656 days ago
Major structures on Phase 1 included the 1.3km Medway Viaduct (completed in 2002) and the nearby 3.2km North Downs Tunnel. Further north on Phase 2, the line passes through a 3km tunnel under the River Thames before running along an extended 1.3km viaduct section under the Queen Elizabeth II M25 bridge and over the adjacent Dartford Tunnel exit road at Thurrock in Essex.
Source:
Between 22:42 and 22:52, 27 walking wounded were loaded onto the rescue train waiting in running tunnel north. The train set off towards France at 23:08 and despite passing through a cloud of smoke in the vicinity of the French crossover, left the tunnel without incident.
Source:
Watson, Paul C.CTRL - Liaison ferroviaire à grande vitesse entre Londres et le tunnel sous la Manche. Lot 350 / 410: le tunnel des " North Downs ", in "Travaux", July - August 2000, n. 766 .
Source:
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North Kent