(25 Oct 2020, 11:45 am)streetdeckfan wrote Is that because the StreetDecks/Streetlites aren't as efficient at higher speeds, or because the ADLs aren't eligible at all?

You can read more about low carbon certification here: https://www.lowcvp.org.uk/initiatives/lceb/index.htm

Wrightbus limit their vehicles to 50mph to qualify for this certification, whereas ADL have a different way of achieving this whilst allowing operators to limit the vehicles to 62mph. The older Streetlites (5369-76 and 8339-46) aren't LCEB which is why these are limited to 58mph rather than 50mph like all the other Streetlites.