"Mizter T" wrote

Obviously under the arrangement for the ELLX up to Highbury &
Islington that has become apparent lately there's no need for the ELLX
rolling stock to have AC equipment, but I was under the impression
that all the new class 378 Electrostar trains for London Overground
were all ordered as dual system (i.e. AC & DC) stock - am I wrong in
thinking this, or has the order subsequently been amended?

November 2007 MR stated 'TfL has ordered 20x4-car Electrostars for the ELL
(plus 108 vehicles for the NLL and Euston - Watford DC). The ELL units will
be DC trains, although they will have provision for AC to be provided at a
later date if necessary".

Peter