(14 Feb 2014, 2:08 am)GMitchelhill wrote Lothian buses did tweak some of their SPDs to improve their emmissions. I don't know if all of theirs SPDs attained at least Euro 3. Also there isn't really anything stopping him from using the Evos on the 33.
The Y-reg ones weren't touched by Lothian as far as I know. Certainly remember having a conversation with Stuart Monty when I was hunting down 192 about them only being Euro 2.
The only thing which is stopping them using the Evos is current allocations - both are required morning and afternoon for the same two scholars each and every day. Same drivers too, etc.
Lovely driver on 106. She's very pleasant.