This was never a regular sight a pair of 90s...but this time 90144 leads the way with a Felixstowe bound
liner at Stratford E.London in the Summer of 2002. Freightliners 10 class 90s had their ETH...electric train heating...isolated and were 
restricted to 75 MPH for a while but have all since returned to being regular 90 0s.
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Photo from James & Martin's Picture Collection Copyright 'Jampics' m.hawkes7@ntlworld.com