London's Transport Musuem Depot has a large number of London Underground maps of different ages, unfortunately I could not get a decent angle to photograph most of them due to their location in narrow alleyways of racking. The maps shown in this picture all date from the period when the Piccadilly Line extension to Heathrow was under construction.
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Photo by <a href="mailto:cmckenna@sucs.org?subject=rail-photo at railfaneurope.net">Chris McKenna</a> 22/10/2005.<br>
Larger, higher quality copies of most of my pictures are available, please email if you want a copy. If you wish to use this, or any other of my photographs, under a different license see <a href="http://commons.wikimedia.org/wiki/User:Thryduulf/Relicensing">my relicensing policy</a>.

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