(26 Aug 2022, 9:40 pm)mb134 wrote None of the current batch as the ones I've seen are on social media pages, therefore can't easily be uploaded here.

There is a picture of a 17-plate  Arriva MMC here though (selector on RHS of dash - note the Voith on the neutral):

Arriva Gillingham YX17NEN E400MMC Cab by Dylan Thomas [FT3800], on Flickr

The original(?) demo looks to have been equipped with a ZF, looking at this picture of it's time with GNE and comparing it to the ZF gear selector found in 'older' Arriva E400s:

Go North East: "The all-new Enviro 400 visits Riverside!" by Daniel Graham, on Flickr

Arriva North East: Sapphire Launch by Daniel Graham, on Flickr