(12 Sep 2018, 7:34 pm)S813 FVK wrote They should just follow on from the indigo batch.
They're for the i4 service replacing the Tempo SRs. I believe one (unbranded bar the light up logo on the front) was used as part of a Careers Roadshow held by ADL in Manchester.
So, 218-230 then - or are there more than 13 due?