The National Railway Museum in York is the world's largest railway museum. Its collections include 103 locomotives and 177 other items of rolling stock, 3,300 models, 6,500 items of silver and crockery, more than 300 nameplates, 350,000 tickets, 1,800 buttons, 350,000 engineering draw ings, 7,500 posters, 200 original works of art, and 1.4 million photographic negatives. It exhibits not only trains and locomotives but also corresponding system components, providing a good context for the main attractions, such as the Royal Trains and the locomotive collection. It explains the course of British railway history from its origins to modern train systems such as the Eurostar. In July 1999, the museum opened a new extension housing The Works, a permanent exhibit divided into three main sections: workshop, working railway, and warehouse. Visitors enter the workshop on the second floor level, and from there one can watch the museum's conservation staff at work on rolling stock and smaller artifacts on the first floor. A gallery throws light on many key topics. Materials on the York Carriage Works connect the museum with the city and show people from distant places the industrial heritage of York. A section on women in the railway manufacturing industry illustrates their important wartime role and their complete replacement by men after the war. Another section on failed components tackles the issue of technical risks, bringing the topic alive with a display of a coupling hook that broke during a derail ment and material on historic railway accidents. The working railway part of the exhibit deals with security issues in a broad sense?timing, communications, signaling, train control, braking, and weather conditions. At the end, a display on the East Coast Main Line brings the visitor into the present and the operation of a modern rail line. In