HISTORY. There is clearly a very marked difference in the height of 'overground' Underground stock and those designed
for the deep tunnels. The first Underground trains ran not much below street level and adopted the cut and cover
approach with large tunnels. This  is reflected in the size of the Metropolitan Line train on the left. On the right the
Piccadilly Line train spends much of its journey well underground and is subsequently smaller. The two were
pictured at Rayners Lane on the 10th June 2007.
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Photo from James & Martin's Picture Collection Copyright 'Jampics' m.hawkes7@ntlworld.com 
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British and Foreign Railway Pictures <A HREF="http://jampics.fotopic.net/"> Jampics Fotopic.</a>