Channel Tunnel over £3 million. Ten workers, eight of them British, were killed during construction between 1987 and 1993, most in the first few months of boring. A two-inch (50-mm) diameter pilot hole allowed the service tunnel to break through without ceremony on 30 October 1990. On 1 December 1990, Englishman Graham Fagg and Frenchman Phillippe Cozette broke through the service tunnel with the media watching. Eurotunnel completed the tunnel on time, and it was officially opened, one year later than originally planned, by Queen Elizabeth II and the French president, François Mitterrand, in a ceremony held in Calais on 6 May
Channel Tunnel of opening because of drivers' difficulty setting their radios to the correct frequency (88.8 MHz). Power is delivered to the locomotives via an overhead line (catenary) at . All tunnel services run on electricity, shared equally from English and French sources. There are two sub-stations fed at 400 kV at each terminal, but in an emergency the tunnel's lighting (about 20,000 light fittings) and plant can be powered solely from either England or France. The traditional railway south of London uses a 750 V DC third rail to deliver electricity, but since the opening of High Speed 1 there is