How many diesel StreetDecks do GNE have on order?

Maybe it's a sign that GNE are happy with the Cummins ISBe 6.7 - but haven't been impressed with ADL.

Ironically - the X1 was supposed to receive E400MMC's until the plans were changed for the Derwentside low bridge interworkings.

I'm also surprised given the clear limitations and to allow future flexibility that GNE did not opt for a low height option.