A ghostly mist emanates from the tunnel mouth. After the closure of the line this bore of the tunnel was used to test one of the Olympus engines being developed for Concorde. The engine was run without oil and was expected to destroy itself within 20 minutes. In the event it lasted for two hours.

Comments left about this photograph:
From John Simmonds at 2007-10-19 01:03:44 : Always a pleasure to see the welcoming mist of a 'new' tunnel!