DRS class 37s are now the motive power for the SERCO Overhead Wire Test Train. Here we see 37605 running 
through St.Margarets on the Hertford East Line on the 21st June 2006.
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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>