Electrical cabinets related to the 630 volts DC electrification of the fourth rail track system used by London Underground. These cabinets are at Aldgate station, the train behind is a Hammersmith & City Line 'C' stock train heading westbound from Aldgate East to Liverpool Street. 
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Photo by <a href="mailto:cmckenna@sucs.org?subject=rail-photo at railfaneurope.net">Chris McKenna</a> 10/08/2006.<br>
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