It is still necessary for ONE to hire in additional class 90s from EWS to cover for maintenance as seen here
with 90018 heading a London bound train through Stratford on November 3rd 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>